The Bootcamp 5 software includes the recommended driver for your radeon card. Just checking, you did download the latest Bootcamp version and install it (in windows 7) prior to anything else? After running the bootcamp software in windows, your radeaon card should show up in your device manager.
Bootcamp also includes the chipset and other drivers necessary to make windows run. So its not optional.
Yup, I did both, fresh install and directly install bootcamp5 drivers, fresh install and first install graphics drivers, almost any combination you could think of.
With installed bootcamp drivers the graphic card shows up, yes, but signature is still "microsoft windows compatibility layer" as I've seen. Also as I have read the bootcamp graphic drivers arent really good for gaming, or is this wrong?
maybe slow down, do it "by the book" once, and after you have everyting installed and Apple drivers, and run WEI, then get the "right" newest mobility from AMD.
Sometimes, in the past, the Nvidia gpu was not installing when users ran Boot Camp 4/5 Setup.exe and had to go in and run just one.
Installing off USB has the unfortunate effect of ejecting/disconnecting the device when the USB driver was being installed leading to a botched driver install. I always run and download drivers in Windows or copy to Windows desktop folder.
I assume you have Windows 7 64-bit, maybe SP1 version, and more than 4GB RAM, 8GB perferably. And "more than enough" space for Windows, for games, for page and hibernation files to reside and still have about 50% free space.