Thanks trixster, that's gotten me going and I can enjoy using both workbench and the odd game again
One question; I had gotten the PAL setup so that Settlers used most of the screen. But then Lotus 2 had a lot of borders around the edges. When I tried a lower res PAL setting to make Lotus 2 use more screen, Settlers was bigger than the screen itself and I couldn't see the controls. Is there a way to get all games using most of the screen or do I have to accept that some games like Lotus 2 will be a bit smaller?