Here's the response I got from E-MU regarding the matter:
You are free to use the Creative and E-MU sounds/samples in any
music works that you create and sell. What you can not do is sell
or distribute any Creative and/or E-MU sounds/samples. Regardless
of the preset or programing of how the sample/sound has been
modified, if it is a raw sound/sample that was created or
distributed by Creative or E-MU, you can not sell it or distribute
it. Creative and E-MU do spot check audits from time to time to
identify proprietary sounds/sample from those who sell such product.
Hmmm... I might not be able to release GeneralUser GS under an open
license in this case, and I really don't have the time to go through
and recreate the affected instruments.
-~Chris