Add support for nested weapon proxies on aircraft.
Example adding a 4-rail launcher to a weapon proxy point. The separate 4-rail "weapon" will then have 4 new weapon mounting proxies again starting with the number 001. This causes problem for game engine, now having multiple weapon proxies with bla-bla.001

For a better explanation please read this post: http://forums.bistudio.com/showthread.php?113118-Tutorial-Weapon-proxy-handling-on-Planes-amp-Choppers

I have also attached a document explaining the workaround, should help you understand the problem. (Document too large, but can be found in link above)