Ok, I'm in & running!
I have a question, though. How do I tell how many "frames" I've completed? I'm running on a Mac PowerBook and I get a picture of the protein and a progress bar that tells me 8.25% complete, but nothing about frames.
I'm on a PC and all I do is double click the icon in the taskbar. The resulting display shows how many.
Also available via right-click (might be a program menu item on the Mac) is status -> user statistics. This takes you to the website and shows your stats.
I'm not sure on a Mac, but see if you can find and open a file named "FAHlog". That's where my results are. (As I've not finished my first WU, no results are posted online for me yet)
On a Mac, Folding@Home creates a folder in your User Library. ~/Library/Folding@Home. What you want to do is double click on FAHlog.txt to open it in TextEdit... it has all the uptodate info on what you are doing including frames / total frames info.
Hope this helps.