I didn't make it!
is there a way so i can enable microphone in doom 3 mutliplayer? so i can chat with people using the mic?
Via teamspeak you can. (its a freeware prog)
Ventrilo is another option for voicechat, and a bit better. For both of these, you'll have to find servers to connect to (or host your own)
ventrillo is a bit complex, simple but still complex. Actually.... they are both somewhat complex. I prefer TS myself