Personally I think it would be silly to have a bunch of 3-4 line txt files. I'm going to mess with hash tables and get that working and post an updated version later.
And sprx, I don't know what to tell you, they work fine for me.
About letting anyone add a greeting, I don't think it matters that much but I guess I'll limit it to ops only.
Edit: Nevermind..hash tables frustrate me beyond belief in mIRC. I don't care too much about this script to be honest, I had only made it because somebody requested it and only posted it because it has functionality that other greeting scripts don't.