The zeal you guys have in defending abandonware from copying isn't really seen in any other fan-club... I can't understand the logic.
The problem isn't old games and old application software, it's Workbench. If you had a CF card from somewhere packed full of games and the like, then they aren't legally allowed to enable it to boot to Workbench, infact there shouldn't be any AmigaOS files on there at all. So upon booting the CF card it should ask you to insert your AmigaOS disks so that it may install AmigaOS (Workbench etc) - then you can boot it and use it, thanks to your perfectly legal copy of Workbench. You'd need a working floppy drive for this though, either that or go through the procedure in WinUAE with Workbench 3 disk images.
Which leads me onto what I said earlier - just set everything up via WinUAE. And no, we're not copyright police or anything. I have 2000 WHDLoad games, did I buy all of them? No. AmigaOS is quite easy to find online last time I checked, although I am by no means saying that you should break the law by downloading it, but you should in theory be able to store backup copies for yourself being as though you do indeed own an A1200 which came with Workbench 3.0 or 3.1. Commodore-Amiga themselves told us to work with self made backup copies of Workbench, not the originals. You have the tools for the job in other words.
Ctrl+M will not work in games.