you can manipulate drivers from catalyst installer
Just follow the walktrough http://support.amd.com/en-us/kb-articles/Pages/GPU57RemoveOldGraphicsDrivers.aspx#Win7
I was scared as well but even before i tried the drivers i got so many BSOD I decided to try and they did well...
Remember to install, Reboot, Test. Them come here and comment ^-^/