Just made some sort of progress. Last report I was booting from 3.1. Booting from my 3.9 partition I've been able to start Zak McKraken, so it seems there is some 3.9 feature ScummVM AGA 030 likes! Couldn't get it to work at the right resolution: whatever I do I'm missing some third of the image at the bottom of the screen both in the game and the launcher, so I almost can't even reach some basic launcher options. No sound at all. ^_^'