Matan Eldan said:
You can't move installed program folder to other drive (you'll need to reinstall the program on the other drive)
Just wanted to clarify that you also have to uninstall on the current drive. It's better to use the uninstall than just delete it from program files, because using the uninstall should
also remove anything it dumped in the system directory.
Also, you can turn off hibernation. Right click on desktop > Properties > Screen Saver > Power button. Hibernation, along with the swap file, were taking up 2 GB on my cramped XP drive.