Hi there. I'm thinking of purchasing Neverwinter Nights 1 and 2. I was just curious what the process is to create your own stuff. Is there a lot of complicated scripting involved or is it very simple and linear? Thanks for the answers in advance.

Yes and no. Yes, is very easy to modify things, actually the first game was made with this on mind (the second they left it but didn't take as the main aspect). But due this, if you know how to program (C style) helps a lot, if you know how to write tree dialogues, helps a lot, if you know how to create new 3d models helps a lot, if you take your time learning you can change heavily the game (I think that for NWN2 there is a FF7 interface hack). This goes to the point that exist a fourth expansion, not official for the first game that have the designers supports (The CEP expansion).

Even better, as you has special hack files (Something like Zips) the modification for certain modules (games) not necessary affects the official OC or other modules, though you has a special folder for overriding files from the game if you want to affect all your games. But of course, the amazing hacks already existing needed the work of many people for covering all the possible areas.

There are thousands of community made mods, add-ons and various customizations found here:
http://neverwintervault.org/

Also, check out some of the persistent online worlds. The old Gamespy page is no longer supported by Bioware (booo!), but there is a listing that is kept fairly up to date:
http://www.nwnlist.com/

That gives you the direct connect information to play over the internet.

It's simple and linear to get started and winds up being very complicated scripting. You can do anything from spawning a monster on the ground to devising a database driven password security system for an online persistent world.

In other words, you can do a lot without complicated scripting but you can do even more with it.