Why bother to emulate an old Mac?
Legally you need to own the ROMS which usually means buying the old Mac;so just use the Mac!
I really don't get going to all the trouble of obtaining files,emplant boards etc .
Older iMacs are available on eBay cheaply and very cheap around university campus-I have a G3 blue/white tower ($20) and iMac($40) .The iMac still had the OS9 on it.
For ME,the gee whiz factor of emulation isn't worth the aggravation.