As far as i know yes in a roundabout way, Ive done just that with my new mod I'm working on. There are a couple ways I can think of going about it. You could just create new armor, replace the old stuff with your new outfit, so instead of STR_NONE they recert to what you have made. On the weapon are you wanting to change all instances of it in game, ie inventory, battlescape, and Ufopedia?