DescentBB

would I be able to make my own countermeasure without overriding another one?
If so, what would I need?

If no one know's I'll figure it out, and post it here

I've tried to do so, and I've driven myself nuts. I made the powerups and the weapons just fine, but could not get the powerups to add the weapons to inventory.

I'm sure someone has done it though.