Well I felt like taking a huge chance tonight by flashing my P5E to the Rampage bios. It was actually a painless procedure that took about 5 min! The bios works so far without issues. I can tell you all that the chipset temps are not present, which means the sensors dont exist. But I have all the OCing features of the X48 Ramapge. I found it strange that CPU-Z and Everest both detect the board as the P5E, but the bios is detected correctly with the 0219 Rampage bios string:
http://i83.photobucket.com/albums/j2...ampagebios.jpg
I did have to disable some of the temp sensor features to keep warning messages from posting about the non-existent sensors making false readings. But the other temps like CPU and MB temps are still working correctly.
I also had no issues with setting up my pre existing RAID 0. I just did a CLR CMOS, set bios back to where it needed to be for the OC, and re enabled RAID.