The problem with Powerstrip is that it's a pig to configure. If you know the settings for your card you can edit the config files but knowing settings for pixel clock, horizontal total, front porch, back porch etc is a problem!
Another method is by fiddling with the settings on the config screen, ie increasing/decreasing dot clock, H Freq etc, and enabling interlacing if necessary. This is really dodgy because if you use an SVGA monitor it freaks out when you go down below a certain scan rate, and if you swap over to an arcade monitor it might be damaged because the rate is not low enough! I have successfully done this but only because I am lucky enough to have an old NEC Multisync II Monitor which can sync on anything from 15 Khz to 36 Khz.
BTW if anyone finds an NEC Multisync I or II BUY IT they are gold dust, if in the UK I will buy it as a spare. They even work with original game boards. My work at the moment on an arcade monitor video card would simply be impossible without this monitor so I hope it stays working!