> But where to put the rom file? A separete rom folder?
Each software list has a specific folder name inside your ROM folder. If you get the PD software-lists torrent you can literally just download it into your ROM folder and everything will work.
> Do I have to get a coleco software list? Where?
You don't *have* to, but we recommend it; the software lists include dumps that have been validated by someone. Additionally, software lists can configure the controller, amount of RAM, video card type, etc, so you can simply choose a game and play without having to know that stuff.
> Do I have to get a separate "software list" for each software-list system?
There are separate lists for each system, and often multiple lists for the same system (e.g. cassettes, cartridges, and floppy disks for the Commodore 64).
> Mame supports Amiga, but not single adfs? Like Winuae? I think not.
Single ADFs work fine, within the compatibility limitations of the Amiga driver.
> I spent hours to find info about that "software lists".
It's not well documented, but it's also not hard to set up, especially from the PD torrents.