Uhm, if you're flashing to WinMo, that's a WinMo problem.
Yeesh, you figured out how to flash OMGB, but not WinMo? You're crazy.
Either go thru the EXACT SAME STEPS with an NBH for stock WinMo, or use an RUU. Please READ!
http://forum.ppcgeeks.com/cdma-tp2-d...2-sd-card.html
Otherwise, you'll just use ActiveSync and the RUU flasher from that stock thread. Use whatever Sprint ROM you want, there's several to choose from. I like 6.5.