I can try to help you.
The 6.5 ROM's are excellent.
This is the ROM I am running
http://forum.ppcgeeks.com/showthread.php?t=79579
and it is bomb. Is that look something you are interested in?
If it is you will need to unlock your phone and then flash the rom. Don't worry because you can always go back to stock if you don't enjoy it.
My advice is to read and then ask questions if you cannot figure something out.
Heres a few links to get you started
Unlocker
http://forum.ppcgeeks.com/showthread.php?t=93252
Other CDMA Rom's
http://forum.ppcgeeks.com/forumdisplay.php?f=98
Good Luck!
Welcome to PPCGeeks!