Corel Photopaint 8 is comparable to Photoshop. I use
photoshop, but I recently used an outdated version of corel,
and found it to be more than acceptable. It has an undo
list that lets you select anything youve done to a work and
pull it out, even if you are already 10 steps past it.
As to your memory, it really depends on how long you can
stand to have your students wait. 32 is actually good enough.
If you plan to do Hi-res work, I would try to get 48 MB.
I also highly reccomend Zip drives. They cost $149, and
hold 100MB of info. the disks are $14 and I've never had