...
I'll be kind as your are obviously new to this...
First, you don't, _dont'_, edit scripts from UED. Very unstable, very dangerous (unstable means you hardly ever get a working object and you also tend to F**** up your game) and any 'changes' you make to existing objects are permanent, and happen to destroy network compatability.
Thus, you visit Unreal Wiki (wiki.beyondunreal.com) and find out about ucc; this is the unreal compile program.
Then you find more info on setting up a project, compiling the said project, finding these elements ingame, etc.