jd,
Check out this link over at HoFo, A good guide to flashing the ROM on an alltel. It tells you what you need to install from the extended ROM too.
http://www.howardforums.com/showthread.php?t=1106805
I originally used the Helmi_C 3.3, but had problems with it.
I am using Saridnours’ AKU v3.5pr4 sp1, it installs the same way, and already has .net 2 installed so you don't have to. The only things I noticed is that smart dialer doesn't work, you have to use a special program to do the ## codes (comes already installed) and fieldtest.exe is missing from the windows folder, so ##debug doesn't work.
Good luck.