You need to go to the following web address and sign up:

http://www.worldcommunitygrid.org/reg/viewRegister.do

• Enter a member name of your choice
• Enter a password for your account, retype to verify
• Enter your email address, retype to verify
• Optionally you can subscribe to the World Community Grid newsletter
• Select the country of your residence from the dropdown menu
• Click on the Select... link to select a team
• In the Keyword Search area, type "JointWinWin" (without the quotations)
• Select the JointWinWin team
• In the Available Projects area, select which ones you wish to participate in
• Read and agree to the End User License Agreement and click on Continue

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When you have joined up, you can download the client software you need to run on your PC, install and away you go! Now you're changing the world 1 unused CPU cycle at a time.

And I thank you for it!