Can you install ALT-F while maintaining existing data? I don't have anywhere to do another back up and don't want to risk loosing my files...
I'm always amused by questions like this - in a nutshell, if you value the data, you back it up and don't f@#$ with the system - if you don't back it up, you have no one to blame but yourself when you lose it, and if you f%^& with the system without backing it up, well you're just begging for trouble - aren't you?