@jaca
Yeah, missed the part about the DVI/VGA splitter....

@Robertc85

If you have 2 digital monitors connected and go to screen prefs and press either "edit" or "new" you should get a list with supported screenmodes.

They all should start with "Radeon9800(pro)" and if some have a ".1" appended you can select one of these to use the 2nd screen.

Note, Ambient itself works on only 1 screen at a time, but you can create a 2nd "public" and move application like Wayfarer over there.