Welcome Gregory!,
I think there are just 2 (from the total of ~40) modules with "specific" license:
The first one, used for advanced sound management, can be used for free in non-commercial applications.
The second one can be used in public scripts only if you distribute them under GPL.
When you create EXE from your script, only the modules it uses are bundled with it. That means, if you don't use the mentioned 2 modules, you can freely distribute the final EXE, even for commercial purposes, without any complication.
In case you use TBASS, you have to pay fee to the authors of the library the module is based on. For shareware it is about 100 EUR, for more info please look here:
http://www.un4seen.com/
Petr
Bookmarks