Things I have seen.

OS's Vista and Win 7 get upset when you go from non-raid to raid. I didn't have any problem with XP when it did it like 4 times.

BIOS probably needs to be told you are using them in Raid form or it will just try to use them in normal form. No biggie, but it changes depending on which BIOS you use. Read manual in back (appendix) for a guide. Should step you through what you need to do.

OS's need drivers to really use the RAID as a raid and not just a un-drivered raid. It may actually let you use it as an un-drivered raid, but you won't get the full benefit from it. The crappy thing is drivers need to be installed during an install. For XP, just do a reinstall overtop of what you have, then patch SP3 and you are pretty much good. I haven't had any good luck with Vista or Win 7 reinstalling over top of itself.

I haven't used SSDs enough, but I heard raid negates trim. Think of trim as a way to defrag (not actually correct, but same result, it works faster). That might make things go slower than you might expect. Not a crazy lot, but still.

I would back the hell up of everything before you try to install it. If it eats your files, no one to blame but yourself. Also, it is probably how you will get the files onto the raided drives.

Make sure you back up imporant files (config files----WTF folder, key broadcasting configs, etc) so if the raid goes kaput, you can still get things back. You are using 2 devices, and all it takes is one to fail and bam, 100% data loss. In other words, backup more than you did in the past.

Good luck.