Windows 7 Switching to Raid0 - Upgrade Disks

Hello,

I'm interested in switching to a RAID 0 setup from AHCI now that I have two drives, but I have a concern regarding the type of Windows7 disks I own -- namely they are the Upgrade version. I have successfully done a clean install from Vista -> RC1 -> Home Premium, but my understanding is that my data will be totally wiped by the switch to RAID. In reinstalling Windows from these upgrade disks, will I run into any problems with it thinking that I don't already possess a previous version? Are there any steps that I can take to pull this off if so?

Thanks in advance for any advice!