I'm still working on the other guides, but here are some links that should help for now:

folding@home download page:
http://folding.stanford.edu/download.html
there is installation instructions and info for each client available, also there is a search box at the top of the page to see if your user name is already in use (a few people have already had to use _CDF on their user name)
If you are a gamer, I would recommend using the text only client because the graphical client has openGL issues with some games
The CDF F@H team number is 13505 (the client will ask the first time you run it)

For WCG you have to register in order to download and run the client, which can be done here:
http://www.worldcommunitygrid.org/reg/viewRegister.do
Even though the United Devices client is the default, I recommend using BOINC, I found it to be much more user friendly. When you register and download the client it will redirect you to a page with installation instructions.
IIRC you set your team when you register on WCG, just search for CD Freaks and it should come up

hope this helps