I've created a Tank addon for you.It's my first addon so it's only basic but it can fire,move and looks like a tank.I don't think its good enough to get accepted and I probably wasted Fernando's time,because I'm not sure I've done it right.I've submitted the form though and it all works on my computer so it might.For thos who have made addons before,you'll know about the line on the inno setup part that says "#include(i think its that or include#)addon_installer_donotmodify" (I dont know if its exactly that)and it wouldn't work with me so I opened the file it says to include and copy and pasted the script itself into my installer(because logically i thought that would work) and it did work .
Although I dont know if it will work(if you get me)

(it worked on mine but I'm not sure about others)