> Hey Sune, my XP folder is currently 8GB but why would you not include programfiles > folder as well or do you normally put that on another HDD? Also the swapfile if that > was on the same drive. All those atleast would be required for a PC to run Windows.
A page file is not required to run Windows, and it can be disabled in System Properties > Advanced > Performance > Advanced (again) > Virtual memory (no paging file).
The Program Files folder isn't part of the Windows core, outside of being created during the initial install, along with the My Documents folder and the like. It is just there as a default path for program installers to work with. Installing something into Program Files will do the same job as installing it in C:\WINDOWS\SYSTEM32 or C:\YO\MAMA. Wherever the files go, a shortcut will end up in the start menu/desktop/quicklaunch and the program will run regardless, unless of course it's programmed so badly that it absolutely requires byte-identical folder names or it fails to load.