unlocking weapon (fps)

well i did the fps tutorial and im trying to do a seccond level i aready added a new enemy but i whant my character to unlock new weapon when he find one. how can i do this if im using the script of the fps tutorial?

I ran into this problem to when making an fps and I couldn't find a good way of doing this, but Dastardly Banana has a great weapon system for fps weapons, which is what I used.

Link: http://www.dastardlybanana.com/FPSConstructorWeapons.htm