For all those who have been going crazy with missionary finding failed Pak files and not being able to run in the game because of it ,I have a little news. I did the SP2 update on my windows XP and started to have the problem. I came here looking for help and noticed serveral others having same problem. I tried all the normal fixes for this kind of problem and none of them worked-reinstalled all the game and associated files-latest version of misionary etc. Found out after a dozen different tries and ways that if i shut my anti virus programs down the problem went away. It wasnt a problem before-just after the XP update. Before i could tell the program to not pay attention to it and it would run fine-but after the update something else kicked into gear and was messing it up. hope this helps.