1. run nwnx -> nwserver will lunch soon after that
2. select one of your modules with PRC installed and click 'Load' (or sth, i have non-english game version ;p )
3. when it finishes loading run NWN as usual but instead of 'New game' select 'Multiplayer game'
4. confirm your login and password
5. select join game in local network - you should see your module on the list
6. join the game and select your character (you can experiment with character in server and local vault)
7. when you see your character in game rest - all permanent bonuses will be applied
8. your character should be automatically saved when you exit the module, you can than use it in SP mode
I've tested this and it works for me.
And it's easier than Leto!!!