i'm going to be installing Panther on my sister's G4, currently running OS9. first, my extremely general question is: what's the best way to do this? my thoughts are that it would be much simpler, and less dangerous to have only the one operating system (Panther) installed. my sister is less than knowledgeable about computers and how to screw them up, and i was told that if OS9's still installed, it's possible she could go in by accident and mess with the system settings. so i was told, do a "fresh install", make sure the drive's journaled and have just Panther installed. i have an external HD to backup and transfer all of her files, not a problem there. but my other issue, is that i want to make sure that all of her files (photoshop and quark projects) work with the new OSX versions of the programs. and if not, she would need to stick with OS9 until that's sorted out (and i don't think she has or could find, the original cd's to reinstall her graphic programs in OS9) so secondly: is there any way to install Panther alongside OS9, and then later remove only OS9?? i converted to macs only after OSX so i've never had to deal with any of these upgrade issues.. THANKS!