If you cannot load vista driver for windows 7, you can use DriverMax to backup driver from Windows Vista (Network, printer,Sound or Graphics cards...).Then set up windows 7 and restore driver.All is OK.

Using DriverMax
1, Download DriverMax - FREE driver download program for Windows XP & Vista .
2, Export Driver (best way is export all driver to "X" folder of D:\ or E:\ (not OS installation disk)
3, Install Windows 7
4, Import Driver from "X".
5, Wait and OK.