IJ Reilly said:Your old applications will migrate into a folder "Applications (Mac OS 9)" within your OSX Applications folder. They won't be deleted. And, if they ran in OS9 before the upgrade, they will run in OSX under Classic, no problem. I personally run both Illustrator 7.0 and Photoshop 5.0 in Classic. Looks a little weird, but it works so well, I haven't seen a need to upgrade.
As for RAM, an upgrade couldn't hurt, but I can attest to running Tiger on an only slightly faster G4 with the same amount of RAM, and it works fine. If you're going to be using Illustrator and Photoshop often, though, that much RAM probably will get cramped in a hurry.
Great stuff. Thanks
One more thing - do I buy a FULL or an UPGRADE version of OS 10.3? When it says 'Upgrade' I'm guessing it means 'upgrade from OS 10.0 or above'?