Need Admin access from User account

alright whats up people, i work for a big company and on all of the computers we use they have all this admin restrictions for everything you try to do. cant even make a new folder without it giving an error. all i want to do is download msn messenger so work isnt so boring but i can unless i can access admin rights. is there anyway this can be done easily. i looked up some info on it and i know there are some programs you have to download then burn to a cd and run it from shutdown but i dont want to go through all that hassel if possible. any help anyone?