I guess I have to get ASUS to help me get a clean BIOS Upgrade and reboot. Pity, you guys are so much more helpful. 
RST appears in my All Programs list, and all of the files appear to be present in the appropriate folder in Program Files. But when I click any .exe's, nothing happens. Except for help, which works just fine. So I guess (hope) iRST is installed, but not enabled. When I can get to BIOS, I'll find out.
The question I have for Intel is: when I re-enable RAID 5 with the same 3 drives, will my data come back?
If not are there any tools that can reassemble the data from the RAID drives?