<parking the truck...>
Remembering that NwN1 is quite old, you have to rethink how mods work a little.
That big mod (and to avoid confusion, we really do need to call it a "hak") (CEP? Q?) is basically a whole truckload of great stuff that just got delivered to the farm.
But it's still in the boxes and bales and bags...
To actually get some use out of that stuff, you need to modify the ".mod" itself in the toolset or download a mod someone else made that uses the truckload of stuff. By default, the original campaign (OC) didn't use any of this later custom stuff. It's that old model A ford with all original parts.
There's nothing to say you can't hotrod that baby! But is don't go fast nor far as it is.
If you're not quite ready to dive into building your own mods, then look at some of the great recommendations on the Module forum. I assure you you'll find something tasty to chew on :-)
<...out in the barn>