Yes, check the trapdoor under your 500 to see if it has a RAM board installed. I had one 10 years ago that leaked and caused major problems.
Your A500 may have a ram expansion board installed. They typically include a battery backed up clock.
The problem with the AmigaForever Workbench is not the legality: How do you plan to transfer the files to a floppy? PC formatted diskettes cannot be used to boot an Amiga and a PC cant write Amiga-Format. So you pretty much have to have an already working Amiga to create the disks.
Harddrives could be formatted on a PC (at least theoretically) but a vanilla A500 has no HD.
