OK, I am missing something here. Reading this:
Just built a pc, want to put windows 7 RC in RAID 0. The info with the motherboard (ASUS M4A79T deluxe) says I need to make a driver disk. I don't have a floppy, so I tried copying the drivers to USB key. Changed BIOS boot priority to the USB key, but keep getting "no bootable partition in table".
You want your BIOS set to boot from your optical drive. You should be able to place the Windows 7 disk in the optical drive and the system should boot from the disk. Assuming that works Windows should start to load.
Now I assume you have already set up a RAID array as you mention RAID 0.
So the Windows 7 install should begin and you will get a prompt to install drivers. At that point you should be able to remove the Windows 7 disk and insert the disk you created with the drivers on it.
You also mention XP? You are installing Windows 7 on a machine with an XP install already on it? Now if that is the case are you starting the Windows 7 install from within XP or are you booting from the Windows 7 disk?
I am currently running Windows 7 BETA in the 32 and 64 bit versions on my test box. Later today if I have time I hope to make a few RC disk for 32 & 64 bit versions of the RC and install them. Maybe I'll setup a RAID array and try what I have suggested.