I'm having a couple of questions regarding distribution of Wolf3d mods, which, besides maps, change graphics and the executable. First, is the reprogrammedá(registered) Wolf3d exe legally shareable? I see all the mods give it in the ZIP file, but I'm not sure if that's safe and I don't want to risk if I can help it (I'd upload a patch instead). And for that, which is the most widely used Wolf3d non-port version? 1.4 or 1.4g (what is 1.4g and where do I find the update)? What are the differences?
Also, similar question about files like VSWAP.WL6, which contain significant Wolfenstein material. If I don't replace anything, only add stuff to the game, and I upload the new VSWAP, I'd also be uploading all the copyrighted material, so the better solution would still be a patch. Do Wolfenstein patching utilities exist or do I have to write my own?
The more important question though is whether is it legal to distribute free copies of modded registered build of Wolf3d.exe, because patching that would be harder for me than WL6.