Quoting Hendrik Boom (hendrik@???):

> I wrote a free game
> (http://topoi.pooq.com/hendrik/dv/free/fun/wander/index.html) once
> as part of the liberated pixel cup challenge
> (http://lpc.opengameart.org/), and I can't put the images
> into the executable as initialized data because of their licenses.

You uniquely _can_ do so -- because, as creator/copyright-owner, unlike
everyone else you are not possessing instances of that work under the
terms of a licence from someone else. You own the copyright outright,
and are free to do with the work(s) as you wish, including if you desire
issuing new public instances of the work(s) under different licence
terms.

I recommend Larry Rosen's book _Open Source Licensing: Software Freedom
and Intellectual Property Law_, if you have interest in this topic.
He has full text online. http://www.rosenlaw.com/oslbook.htm