near infinity... a little help! :)

Hi everyone!
first thing to say, I know nothing about modding and I never used Near Infinity... So I downloaded it, but I don't even know how to start!! there is no a exe file to execute the program...
I just wanted to create a custom item (like a katana or something like that) to give charname (for BGEE).
so if someone can give me some hints please! :)
thanks