BTW, you can also use iGame on A600 (just remember to download missing MUI*MCC 68000 versions from Aminet). You should also disable iGame picture preview in the iGame icon tooltypes (I didn't recompile for 68000 the MCC of the picture preview or there was some other problem, I can't remember).
Another option is using a launcher like the one done by killer gorilla. I adapted Arcade Game Selector to work on ECS and did small changes to load images using datatypes although I didn't add scaling and colour remapping. I did a pair of preview pictures using 16 fixed colours and some images didn't look nice so using grey tones like Killer Gorilla did may be a good idea. I also thought about showing a fullscreen image and impose the text on top of it but I thought it would eat too much precious chipram :-) I can send by mail my modified ECS AGS with sources if somebody is interested.
About the hardware:*get 1MB of chipmem more, A600 5.5/8MB internal expansion and a compactflash/sd pcmcia reader.