Process Tamer promises :
from the link you give me :
"Of course there are times when you probably won't want Process Tamer to change process priorities, such as when playing games or if you are burning a cd/dvd on a slow computer; just double click its icon to toggle it on and off. Or you can also specify override rules for specific applications in order to tell the program to ignore them, force them to high or low priorities, or even to kill them as soon as they are found running
The new version 2 release includes a new separate standalone configuration tool which lets easily setup exclusion rules, manually adjust process priorites, and more, without affecting the efficiency and resource use of the resident system tray tool. "