For your future reference, FoC doesn't run on more than 1 core so you don't need to worry about other applications very much. It's raw clock speed that seems to matter most
I know that EaW as a whole runs only on one core, but believe me, PR is totally unplayable if BOINC/Seti is running in the background. Even smallest scenarios. Only skirmish works reasonably well, because it doesn't involve calculations on galaxy view.
Anyway will switch to smaller campaigns (Yay for Thrawn Offensive )
*EDIT*: If it is any help in solving this, uploaded last save from aforementioned game. [solid-rar archive] Basic Uploader was uploading and uploading same file over and over again, left the room for 5 minutes and it uploaded 30MB out of ~2MB file... if I could only multiply cash like this! LOL!