My experience is that your Raid will not show up till after you have loaded the driver. So when you get to the part where is asks you where you want to install windows, there may not be any drives showing till you load the driver. Most new builds will see a usb jump drive and I have loaded drivers from a usb before. I would suggest that you have only your raid setup installed at the time of installing windows 7 as sometimes it gets picky and will name raid drive setup "D" and a normal hard drive "C" even though you are installing to the raid setup. So then your OS is installed on the "D" drive and that make installing all other programs no fun as you always have to change the default install to "D". That has happened more than a few times to me. So Just to make sure windows installs where I want it to I only have the bare essentials in the new build when installing the OS.