Secondary VGA monitor Debugging

I have a Geforce2 (a Siluro MX400). I installed both Xp+Numega 2.7 and windows 98+softice 4.05. Setting the Universal Driver softice works in both the Os, but It can't run in full screen mode. As I don't like working in a window, is there a chance to work in full screen mode ?
I have a on old ATI card (which worked fine with ice 4.05), so I
ask you : is out there anybody working with a secondary VGA monitor, that is with two graphics cards and two monitors,as explained in ReadmeSI.htm, from Numega 2.7 docs ?