harddrives can be plugged into a raid controller and not be in array. for instance, my ide0 and ide1 are used by my cdrom and bunrer... my 3 hd's are plugged into my raid controller but they aren't configured in any arrays... just using them as normal ide channels.
i could try to give you lots of instructions and have you try different things, but just do this...
plug the main hd up to your mobo (not raid controller) and install xp... once it's done and your raid controller's drivers are installed properly, plug the c: back up to the raid and it should work. does for me, at least.
my recommendation is see if you can get hold of a hard drive with the capacity of Data you have used then format the two drives and put the data back. This is only really needed if you did striped RAID. Mirrored should be OK.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS