For users running Windows Vista, select "Run" from the Start menu.
Type regedit and click OK.
Scroll to the key: HKEY_LOCAL_MACHINE - SOFTWARE - Microsoft - Windows - CurrentVersion
On the right window, double click on the key ProgramFilesDir and modify it to include the new path for the installation folder.
For example, D: Program Files would install files on the D partition instead.
Evo provjerio sam, radi i na sedmici. A možda i na xp-u, ne znam koji imaš.