I can create weapons by reverse engineering existing ones and using existing images (because I'm not great at the numbers game for that), so unfortunately I won't be able to help you there...
I can make the blueprint itself but the animations is something I can't create from scratch atm.
Best bet whilst waiting for someone who can and will would be to look into this:
http://www.ftlgame.com/forum/viewtopic.php?f=12&t=17122
You can also use an existing ship mod that's using a custom weapon and try reverse engineering it yourself.
If you're looking for some ship, check my Nebula Drifter.
It comes with a custom beam weapon and a custom bomb weapon.
It will be easier to reverse engineer from those as you won't get buried under a ton of weapon blueprints and animation sheets.
Anyway, the choice is yours, but making the step to creating your own weapons will be great for your own modding skills.
).