Upgrade of PC to run CoD Properly

[Bikerjack]

One thing I haven't done is reinstall COD from scratch - I have the CD that the missus bought me (and has regretted it ever since 'cos I spend so much time either playing or tweaking!!)

This paragraph from one of the posts intrigues me:- "*Reinstalling The Game after the latest patch has proven to be a performance booster."

I have recently installed the latest 1.07 patch. If I reinstall the game as suggested, do I uninstall first - in which case what happens to the patch tweaks? - or just reinstall over what I have and everything will fall into place? I gather a new Beta patch is due imminently.

Will I lose missions that I have created? I am still getting green smoke and dust in Mission Builder files whether old ones or newly created. Is there a fix for this. Nothing I do with CCC settings makes any difference. The standard Single player games are fine?

I also have Buchon's SMAA installed. I assume I just reinstall the files after the program is installed?

Would appreciate some guidance (again!).

Thanks