In that case, you can use the Kazaa K++ hosts file for free. This does not require Kazaa to be installed on your computer. It's a long list and is updated regularly. 127.0.0.1 is a "null" address, so the ads never reach you. I use this in combination with Mozilla's popup blocker, Spybot Search & Destroy, and a few other doodads.
They don't allow direct linkage at the site, but the main site is
http://www.kazaalite.tk/
Check out the Supertrick link on the left-hand side. You can download the file by clicking on "Other" in the Downloads section on the left-hand side.