Photo Viewers

i am a cyber cafe owner. i have created limited user accounts. now i want to restrict other users from opening any other applications like windows media player,games etc etc etc. actually i want to allow MS word, photo viewer,outlook express,internet explorer/firefox only.

can u explain in step by step method? or any software for this? any freeware? [no matter if its shareware..... i know what to do:)]
well, i did that. i have created limited user account but how to set rights? how to ban other applications?