If you want to help fold proteins for research/join the group, then download the program from here:
There are many versions of the program avavilable for download, but it should be pretty much self explanatory which one you will need.
The graphical client is the version that allows you to see what the program is doing - it shows you all info and displays a random model of a protein whilst it folds. This is the version that most of us use.
If you want a no-nonsense version, download the the text-only console version. This version runs completely in the background, and you'll have to enter the startup info in a DOS-style screen. You won't receive any info about how complete your current units are, or even what you are doing, but this version is slightly more stable than the graphical client version.
Just choose the latest version for your system, then choose if you want the graphical client or the text-only console. I'd personally recommend the Graphical client version.
Once you've downloaded it, just follow my instructions on this thread and away you go:
My instructions are in the last post on that page. If you need more help, try the pages after that one, or send me a PM.
The most important thing to remember when setting it up though, is that we are team number 46574.