(I've also tried installing Quasi88, which seems to have gone fine, but attempting to boot a game disk just leaves me looking at a black screen saying "V2 4MHz". I can access the menus with F12, but nothing in them gets me anywhere.)
EDIT: Ah, wait - so far as Quasi88 goes, it seems I was just really unlucky in my choice of games. I managed to pick a 100% fail rate of ones it doesn't seem to run (eg Xevious and Pac-Man). Other stuff like 1942, Bomb Jack and Dig Dug all work. They still don't in AdvMESS, though.