ok, first download BOINC
Install that and run the manager.
Then go to the dropdown -> tools -> attach to project.
Hit Next and in the url enter http://aqua.dwavesys.com/
(as it's not in the list yet..)
Follow the instructions to create the account and it should download and start crunching.. !
Then go to http://aqua.dwavesys.com/home.php and login to your account.
Hit the find a team and look for Free-DC and join it..
Any problems let me know.
This is the same procedure for every BOINC project out there and you can be attached to more than one at any time if you wish and allocate resource shares to each..
Bok