bassbong Have a look through the example mod in
[Install location]/Cosmoteer/Standard Mods. Also, make sure when you start making mods, you install it in
Start simple, like changing the range or damage of the laser blaster. Don't dive head first into modding buffs or railguns or things like that.
Make sure you have a proper text editor, like Notepad++, Sublime Text 3 or Atom (or similar), not MS Notepad. If you use Notepad++ or Sublime Text, I believe there are some syntax highlighting packs somewhere on the forum (I'll have to find them somewhere else, sorry). Using a proper text editor makes it easier to code and check that you've balanced brackets.
If you want to sprite, use Paint.net, Krita or GIMP. They're free.