That's what I feared.. I don't know why Dell would sell a home pc (this is running XP Media Center after all..) with a Raid setup. I've never come across one in 10 years of working on computers..
There doesn't seem much of a case for Raid 0 just to get a bit more performance compared to the downside of losing your data..
I'm going to speak to the data recovery company I mentioned in the morning to see what they say..