NeverwinterVault has some downloads that should have what you're looking for. I think Bioware put out a script list in Word that details all the scripts that come with the game.
nwn.lyoness.com has a script library that's continually growing. I've stolen some good stuff from there.
Finally, the official boards have a scripting forum where community members post scripts and ask for ones they need.
Normally I'm fairly smart, but I admit the scripting thing often throws me

. So far I've been cutting and pasting my own scripts using pieces from other people's work. Next step: building quests (my recommendation is to download the module tutorial from NeverwinterVault: it's got a good walk-through).
LB