Being lazy, you can place it in the directory yourself.
http://puu.sh/ipYpK.ddsThere's your mod. Goes in
data/gfx/gui/gui_ver2
Do
not rename it.
What the file looks like in paint.net
How it reflects for me in game, with emain background.
Off-topic.
Yes, i have 72 bullets in that gun. When guns first came out, i upgraded a few different ones, on multiple paths, to see what i liked best. Seeing as there was extra range and bullet count, it seemed a good idea. Ended up just doing pure damage, but hung on to the one i upgraded with range+bullets, for clearing trash mobs.