So i would really like to have the room where you can activate the power to have its door open by shooting certain objects, but i have to say i dont know anything about scripting actually im new to this although i had some modeling experience before. I would really appreciate some help and of course i will mention in credits of map.

Here you go bud - You could edit this script easily enough for what you're wanting

http://ugx-mods.com/forum/index.php/topic,13225.0.html