Of course skip the customizations then run the cabs recommended here:
http://forum.ppcgeeks.com/showthread.php?t=3660.
If I remember right, 2.2 is a Verizon rom, don't think you'd want that. The absolute latest sprint rom (Still AKU2.0) is here:
http://www.utstar.com/pcd/downloads/...0_WWE_Ship.exe
Don't forget the DST patch here:
http://www.utstar.com/pcd/downloads/...%20PPC6700.zip