Ronster

Problem resolved. Configuration changes in both RX and TX CDM750 per comments here and another site and a tweak in SimpleUSB.Conf. Fortunately, I just procured a copy of The CPS software.
After a reboot and and run of repeaterfinder.sh, I’m now listed as repeater 22802.
Now, I just need to figure how to manage my node!
Thanks everyone. 
 
 

Basic repeater instructions would be to program it to your intended frequencies (Transmit on the Lower frequency, Receive on the Higher frequency) - and for GMRS, make sure that the channel is set to 25kHz wideband. You would also need to let them know the specific Tone code (PL) or DPL that you plan to use.
Now beyond that, there are tweaks and settings (as well as a tuning procedure specific to the MTR2000 that most hobbyists are NOT qualified to perform) - but if it's a used repeater, those functions should have already been set and tuned, and now the new frequencies just need to be programmed in, and then everything double checked on a Station Monitor.  Used-Radios.com is more than capable of doing all of that, and doing it well.
Unless you have some exotic use case beyond a simple repeater, there isn't all that much information to give them. Freq's along with your chosen PL/DPL, bandwidth, and your FCC call sign if you desire CWID.

OK, seemed like you have been referring only to duplexers.  MTR2000, being a commercial grade repeater, has limited internal options.  To do some of the more 'hobbyist' features requires an external controller.  Repeater Builder has many articles on this repeater and possible options.

http://www.repeater-builder.com/rbtip/mojoindex.html

I have bought 2 radios and a repeater from them and i cant say nothing bad about them they have gone above and beyond in my case even when the mistake was my fault.

As mentioned above, there's no need to program any other frequency on a repeater  except what you will be using for the repeater. In my case my repeater also can be switched to act like a base radio so i did program a few repeaters in my area so i switch to base and i can transmit to those repeaters and when im done switch back to repeater mode.
Being a MOTOROLA getting the software for yourself is a bit costly and to be honest Motorola software is not easy for a novice there's so many ways you can screw up your repeater. Ask them if they can send you the codeplug of the radio once they program it that way you have a virgin codeplug in case anything goes wrong with the repeater.

+1 on this. Sunny Communications a.k.a. Used-Radios.com is a great company to deal with, and will get you what you need. Have dealt with them for years and spent more of my and corporate money than I probably should have with them. In many cases they are the only ones still sitting on product, even if slightly older gear from Motorola and other manufacturers.
I also recently used them to prove a point to my current employer: pay full price direct to Motorola and wait six months to receive the item, buy from a local Motorola reseller for a little less and wait a few months, or go to Sunny Comm and buy current stock at one third the price as "new old stock" in their current stock, receiving the item a week later.

A quality duplexer is, or can be expensive, but it's what you want.  Stay away from the 'flat pack' mobile devices.  They do work, but these days you can never be sure of where and how they are built.  You are looking for low insertion loss and at least 80dB (or more) isolation.

The aforementioned (used) Cellwave duplexer mentioned by a previous poster looks like a good deal.  Most new duplexers of that grade cost twice if not three times the price.

Celwave RFS Motorola UHF Duplexer 0185417U05 440-470 Mhz Quantar MTR2000
from Used-Radios.Com

Celwave RFS Motorola UHF Duplexer 0185417U05 440-470 Mhz Quantar MTR2000
from Used-Radios.Com

Motorola repackaged a nice Celwave bandpass/band reject duplexer with most MTR2000's, although that was not the only possible "MTR2000 duplexer" that might have existed.
If you have a link or more detailed description, it might help to figure out which one you're looking at.
EMR makes some decent equipment, but the model you have listed is a basic "flatpack" compact mobile duplexer which is a Notch style - not the greatest duplexer for use in a high quality repeater install.
Any duplexer requires tuning to operate on your exact frequency pairs. The Celwave MTR2000 duplexers sold by Sunny Communications (Used-Radios.com) for $525 include tuning. That duplexer is the real deal.

I wouldn't expect the Shari's to cause you any problems; but since you're probably familiar with AllStar - using that package as a repeater controller is perfectly feasible as well; it's the same back end that the myGMRS network uses should you be interested in linking at some point (or not)

So far so good, recommend running the 40 watt radio at 25w and blowing some cold air on it if you're going to turn the keys over to the public or use it for a good rag-chewing session; if you need a simple repeater controller to handle time-out and ID consider the ID-O-Matic IV - it has a built in fan controller too.
If you have other transmitters with decent power output at your house in the 70cm or other UHF bands that will key up while the repeater is in use, you need to be aware of and understand mixing products, how they work, and how they can be mitigated. Mixing products can and regularly do wreak havoc throughout the radio spectrum and cause all kinds of problems not just with your own gear, but other licensed uses as well. I can elaborate if this will be your setup, they're one of the reasons why commercial sites are more complicated to install at properly.
What feedline are you planning on running? Good grade cable is tantamount to having a good set of ears as the cheaper stuff will cause noise to the point where it deafens your receiver, since your transmitter is sharing the same cable as the receiver. RG-58 or RG8x isn't going to cut it; good quality LMR400 is fine for backyard or other 'short-run' installs, hardline is better but will probably not pay back in your application - save that for a site you don't want to have to yourself drive back to. Don't forget grounding, weatherproofing, and surge arrestors, but that's kind of a given...

Turn that 40 watt transmit radio down to 25 watts if you want it to live. And blow some cooling air on it with a muffin fan. CDM's are good radios for the price, but they're not designed for even a 25% duty cycle at high power. The difference in total coverage area will be small, your transmitter will thank you, and your receiver will probably work better. 
 

Sounds like a good setup -  try it and see how it works!  I'm using an old/used VXR-7000 repeater with LMR400 coax, PL259 connectors, and a Tram 1486 antenna - I have a good/high location and I get a range of about 55 miles - it would be further but I'm surrounded my mountains..  Location more than anything else will determine your range but that tower should help.
Be wary of "some people" that will leave comments and try to drastically over-complicate everything trying to impress us.

Good radio choice, just make sure you get decent cable (heliax 1/2). Use N connectors if possible. I personally would chose a 2-bay or 4-bay dipole over anything Diamond made.... 
There are places like radiomobile.com that will do a crude site analysis for you. You punch the gain, the location, etc, and you get a coverage map. 25 miles in UHF is hard to achieve, especially in rough terrain.
G.

I''m trying to put together a repeater using the CDM750 radios I have. My plan is to use the 25 watt for RX and the 40 watt for TX. The duplexer I'm looking at is the EMR 653160 MC.
The frequency I'm thinking is Rx at 462.550 and Tx 467.550. My antenna is a Diamond X700 dual band mounted on my 43' tower with a 380' asl.
I actually never planned to use this antenna but it is almost flat across the 462-470 Mhz range. with a forward loss of almost nothing.
Since this is my first GMRS repeater, I plan the range to be around 25 miles hopefully.
I would like opinions of experience GMRS repeater builders on this arrangement.