They wouldn't be ROMs because the Amiga games didn't run on cartridges
You mean disk images, and it's easier said than done to transfer them over. The basic problem is that the basic PC floppy drive can't write Amiga disks, so you have to transfer them over to the Amiga and then use that to write the disks.
Do yourself a bit of a favour and look for a <4gb laptop 2.5" HDD, the Amiga 600 (and 1200) can accept those and format them as you like, and then look up some WHDLoad game collections. You'll be able to play bugfixed versions of classic games directly from Workbench!