I need help dual booting on RAID0 hdd arrays

Hey, I have twin 750gb hdd which are set into two arrays, one is 1.3tb the other is 50gb. When I go to install bt5 it doesn't have "Install side by side" or anything but I can choose between the arrays. I'm worried about doing this because they BOTH have "Windows7(loader)" on them when i select them and I'd rather not mess up my current install. So if anyone can please shine so light on this for me I would be very thankful.

Not heard anyone trying to do this, and I'm not sure of the requirements, or if it is possible (it likely is though).
I would suggest looking into what it takes to do this with Ubuntu 10.4 and go from there.