hi & welcome,
you have to use the disk-images with an emulator, winuae. if you are using the recording function of winuae, you can capture an .avi and dont have to emulate again.
just get winuae and google for the amiga-rom files - kickstart files.
i guess these disk should work with a default A500-setup ( you can choose this, from within winuae).
i cant answer the remaining questions - i simply have no clue, maybe someone else can/will do this.