You need to load drivers for RAID as done on page 15 in the guide.
To get the drivers, go to AMD Support & Drivers
http://support.amd.com/us/Pages/AMDSupportHub.aspxIn the upper right select drivers for Motherboard/Chipset
Product Line: AMD 8 Series Chipsets
Product Model: All 8-Series Chipsets
Window 7 - 64 bit
Click View Results, this takes you to the drivers. Select the 29MB download AMD RAID drivers.
After downloading the .exe file, run the file. This will just extract the compressed files to a folder that you choose.
Go into the folder and look for a sub-folder named Packages, then Drivers, then SBDrv, then SB8xx, then RAID, then W7.
Put the files in the W7 folder on the USB Flash Drive.
Add the driver in the beginning of the Windows 7 installation as on page 15 of the guide.
After you install Windows, you can install AMD RaidXpert Utility from the AMD download page.