Thank you for getting back to me.
I haven't thought of licensing very much, since my codes aren't nearly good enough to be licensed. Also, I know that there are a lot of different licenses out there (e.g. MIT, Creative Commons, BSD licenses, various GPL versions, and LGPL). When I encounter them, I know I can generally use/study the code. If I'm unsure, I can always ask. But, I feel I don't know enough about the issue to make an intelligent decision when I'm on the other side.
Based on FSF track record, and reputation, if you require me to use GPL to use the images, I will.
But, what do you think is the best way to approach the licensing issue? Or, learn about this issue?
Best Regards,