Hi Im carlR (different username when at work!!). I have tried all sorts of changes to graphics settings for both card and game. I have even overclocked my CPU. I get good framerates as far as I can tell. Whilst I now have stable graphics on plain maps, those with lots of terrain, usually a combination of buildings with lots of vegetation, I still get problems. Played 'Just Another Day' last night and this is one of those scenarios that refreshes. I have Intel C2D 2.40 CPU, 2 gig ram, Nvidia 8800gtx. Using 163.71 drivers. Tried 169.21 but they made things worse. Will now try 163.75 since they work for Erwin. Thanks for the advice.