what's the difference between an empty mesh and an empty
Well not that much but Blender recognizes them as 2 different types of objects. One is a mesh, blender doesn't care if there's any vertices there or not (unless you're exporting) but an empty is just a null object that is used either for scripts or in a rig.Kinda hard to explain, read up on it.
So I can use either one?
Well if it involves a script then probably not. What are you trying to do?
Just export stuff, thats all.Anyway, Demian told me that when I make a projectile model, I need to add empties.Can you add that to OP?
Actually no for a projectile you just need to let blender set up it's own hierarchy for you when you export. I'll add that though.
I exported with empties and it works fine for me.
Where can I find the .blend file of the Blockhead so I can see what size my weapon should be, where I should place it etc.
I found an .obj for the hand http://www.mediafire.com/?azaoxunsmt3Blender can import obj files. If you really want a blend file there's probably one you can find by searching around.