Don´t use Multiscan !! It slows your computer too much and your can not Overscan that screenmode either. Try to search for the screenmode DoublePal Hires No Flicker and Super72. Those are the ones that worked best on my A1200 with Blizzard 1230/4 and vga monitor (actually it was a 1538 multiscan but it later also worked on my 19" pc monitor) ...
