Sprint Touch Pro 2, Custom ROM GSM not available via Network Services

[Slevin]

I've got a sprint TP2. I've purchased and applied the SIM unlock so I can use my t-mobile sim in the phone (my iphone died, and it's my primary line). I've currently got BigMaxSenseROM-23563-Sprint-5-30-STOCK on my phone. When I go to phone, options, network to select GSM...it's not available. The only choice there is CDMA only! Is this a ROM issue or some other issue I don't know how to fix. Please, I tried a quick search, but I"m looking to get this working as my primary line is down currently. Thanks for any assistance.

Slevin