Installed on the ps3. Runs not so much..
Also, how do I get it to run in the background all the time on my PC? Except when I'm playing games and such...
I'm not sure what Ta10n linked you to, but it didn't look like what it should.
Anyway - are you running the talking about a CPU client, CPU console, GPU client or GPU console that you'd like to have running in the background?
If you're talking about a console version of either, you should run it from a DOS prompt with a flag of config. Then, when you get to select whether or not you want it to "run as a service" type yes. Continue to follow the configuration until it finishes, and then it should be installed to run in the background. If you want to turn it off when you're playing a game, you'd have to CTRL+ALT+DEL and find the correct processes in the processes tab... but I wouldn't recommend doing this since both consoles will give you all the CPU/GPU power you need and only use what is left over.
If you're having trouble, feel free to PM or IM me.