New
#11
This is better and easier solution.
You need Vista install DVD. Boot Vista Installation, choose Language press next and than press "Repair my computer". On next window u will have few options, choose "command promt". Remove Vista DVD and insert Windows 7 Install DVD. Navigate to DVD (for example d: or e:, depends on your drives setting, than go to folder sources (type "cd sources"), and type "setup". Installation will start shortly. Now just follow instructions :)
Good luck