I have found the bug (my n950 didn't suffer because of it) with the help from Adrian (he post on my blog) and a new package with the fix and scaling/rotating sprites functionality in MegaCD will be send to QA process.
devel-su Password: rootme ln -s /home/user/MyDocs /root cd /home/user/MyDocs/emumaster/psx /opt/emumaster/bin/psx YOUR_GAME.iso