Oh and be mindful of the hard drives you use. The older AmigaOS could only address 4gig on the HD. If you try to set up partitions beyond 4gig you likely will end up over writing your earlier partitions. I think HD support is improved starting with OS3.5 and also 3.9, but you will need 3.1 roms to use 3.5 or 3.9. Many A4000's and A1200's only came with 3.0 roms.
Plaz