Okay, on the website you linked it says:

* Open the nwnprc folder.
* Create a text file called config.make (.make is the file extension).
* Open this file, and type in these three lines for NWN1:

NWN_DIR = C:\NWN
PRC_VERSION = 33g
PRC_INSTALLVERSION = 3.3g

I think the "nwnprc" folder is just whatever I checked out the files into (I don't have any nwnprc folder on my comp), but I really don't know where the g in 33g is coming from and what I should replace it with for 3.4.  

This is maddening!

When I run make.bet, I get

Building makefile
Updating dependencies
acp_auto.nss
Unable to locate or open Neverwinter Night
NMAKE: fatal error U1077: '"tools\nwnnsscomp"' : return code '0x1'
Stop.

Maybe this has something to do with the contents of config.mk, which was there before I made config.make.

I'm creating a new base class using the PRC manual's prestige class creation tutorial as a guide.  

I have to edit .2da and .nss files that are currently just parts of the .hak files on my machine.  I've extracted some of them and can edit them easily enough.  But then I didn't know how best to get my changes back into the hak file.  

For example, I can just use NotePad to tack my new class's line on the end of classes.2da's section in prc_2das.hak, but will that work?  It doesn't seem like the right way.  Also, I know when I start editing scripts, I'll have to compile them.  Then how do I get them back into the .haks?  

I want to learn to edit and add to the PRC hak files.  Or just edit the component .2da and .nss files in directories, as the manual says is possible (but I didn't quite get how).

Windows Vista, PRC 3.4, Java 1.6.0_16, NWN Diamond 1.69.

I tried searching the forums, but this seems like something you all know how to do so well already that you rarely have to explain it.  Any advice would be appreciated.