Well, I tried it after all. It wasn't too much work, and it got me some more practice at mutliplayer coding which is not bad for my project at all.

First of all, this is not a demo that's supposed to show off anything but a simple muliplayer connection and WED's default WAD :P.

It's nowhere near perfect, but I don't really want to do too much for it any more cause it's kind of a boring game to code. You can host a game, join a game and shoot at the other player. There's basic movement-prediction and interpolation in there (it's kinda fun and relativly easy coding it for a shooter (good news for you) after having coded it for a space simulator. No tilt angles to worry about here, and even if you add them, they won't go above 90° which is SO much easier) which can be improved but work fine so far I think.

I only tested it on LAN, but it should work over the internet and if you want to i'll try it with you.