ok what you should do is flash this ROM:
ftp://Mogulrom:sprinttitan@files164....CS_AM_Ship.exe
That is the 3.35 official Sprint ROM, which will flash a 3.35.04 radio into your phone and you should then be able to use the phone functions and all the stock setup from sprint.
Then read completely the stickies in the Titan Upgrade section to go with any of the custom ROMS. Good results are possible with the No2Chem 5067 ROM or DCD's 3.2.0 ROMs.
You will indeed need to run the Olipro 2.4 SPL unlocker to be able to flash these custom roms. The Sprint ROM I linked for you will flash with any SPL bootloader. Again follow the instructions from the stickies...