I've been folding for a few months, always good to share my gear for a good cause. I basically set Boinc to run on startup on all my machines, but I close it whenever I notice any video lag or anything. That way I can "accidentally" be contributing. I'd never be dedicated about it if I had to start it up manually on a regular basis, and since I have it running quite a bit without my knowledge, I never feel guilty about shutting it down. As you can see, I prefer Rosetta, because the work units are reasonable and I believe in the cause.