"Daemon Tools" free edition comes with adware also, but it does allow an "uncheck" opt out.
I personally haven't dealt with either of these programs, but is it possible there could be an opt out with the DIVX as well?
If you "want" junk, extras, and advertising, consider Adobe reader 9, and leave everything checked!
While we're on the subject, "SIW" (System Information for Windows) is still described as an executable file, that runs without installation. This was absolutely true of the older versions. However, the same double click on the newest version, summons an installation wizard.