Okay, so I updated Bootcamp prior to downloading XP SP3. But there's a problem. The Bootcamp update has reset all my Windows settings, and especially has completely messed up my dual monitor setup. The problem is that Bootcamp is now booting Windows into a low resolution and is not showing anything on my second monitor. I cannot access my graphics preferences because the dialogue box is being shown 'somewhere' on an imaginary screen somewhere that I cannot access! I've used Windows for years, but I cannot for the life of me figure out how to reset everything to single monitor so that I can start again and access the Control Panel properly.