I just have multiple Phoenix .bats in my Phoenix folder for different purposes. One called Full.bat for high aggression when I won't use the computer at all, one called Use.bat for when I'm using the computer but not for anything particularly intensive, and one called Perf.bat for gaming and the like.
I also have a Namecoin.bat for mining Namecoins.
interesting, does that switch automatically, or do you still gotta click some buttons?
Nope. Use.bat starts automatically on boot, if I want to switch I have to close the miner and start the appropriate .bat