Ah ok. I was hoping that all I had to do was pop in a cpu card from an A4000 or something. Should have known it wasn't that easy.
Well since I'm going to be using this system for WHDLoad gaming, I should be good with what I have then. I'll scour ebay for ZIP ram if I can find it (still need to know what I'm looking for though), but the extra 8MB from my card should do for now. Do many games need more than 4MB of fast ram?
I believe this system also has KS 3.0 roms in it (he's running WB 3.1 but never upgraded anything so I doubt he has KS 3.1). Is it worth the $21 or so to upgrade?