"Operation Flashpoint is not installed on your computer.."
 

I have a dual boot, with WinXP and WinME. I've recently found that my ME HD used for games is slower than games with XP on it. So I simply applied the no cd patch and reg hack to XP and dclicked on OP:F icon from ME drive. This works fine, however I cannot apply the 1.2 patch because XP doesn't think it's installed. Does anyone know a way round it saying "Operation Flashpoint is not installed ...." whenever I clicked on the unsafedisc'ed 1.2 upgrade?

Cheers