I *think* have a copy of 2.5.1. Unfortunately, it's already been registered, since it's installed on my IIci. I may also have 2.0.1, but would have to look for the floppies. With respect to 2.0.1, it doesn't have jpeg support, whereas 2.5.1 does. Otherwise, the interface is the same, and I'm pretty sure it has the PS Preferences folder.
Better yet, here ya go...
The 2.5.1 link is to the original install disks with serial number. The 2.0.1 link is a personalized copy.