020 is for the picasso driver in UAE-E, the OCS/ECS/AGA driver is not recommended as there has not been much effort put into them yet.
Then you need 1mb of ram that doesn't disappear after a reboot to store aros in. So if you only have chip ram then you need 2mb of it, so 1mb of it is used for storing aros and the rest is used as chip ram. If you don't have 2mb of chip ram then you need at least 1mb of local fast.
When it's complete you'll be able to burn a rom and then it will be alot simpler, except you'll need to figure out how to add 1mb roms.
Or don't figure that out just yet. Compress the ROM instead and unpack in RAM at boot. It will make classic Amigas faster too, avoiding the slow ROM chip at runtime except boot.
