Hello all, I have skimmed through several threads and posts over this site and I don't think anyone has anything to say about this, other than the RAID card thread... So I decided to post this to see if anybody else had attempted this at all... I have a mac pro (2007) and a RAID card and wanted to install windows on it. Since all internal drives are out of the question, because the card overrides the internal sata controller, I was left with the option to either use the infamous 'unused' sata connectors on the left hand side of the motherboard, attempting to install windows on an external usb/firewire drive or as mission75 suggested, buy an e-sata controller and boot windows from there, since he had already done it (without a RAID card installed though). So I took this last route and guess what.. it did work! but I am still having some problems, namely that I can't boot if all the RAID hard drives are connected :-( I have been using rEFIt to try to see if it will boot off the card, but even though the card can be seen using the pci command, I can't see the device using the devices command. I am starting to think that I need an EFI driver for the card in order for this to work, but perhaps somebody else reading this has a better idea? A more detailed description of what I did can be found here: http://forums.macrumors.com/showthread.php?p=5357458#post5357458 Alternatively if you have a RAID card and have installed windows somehow let me know! M.