PRC FAQ

Q1.) What is this switches thing?
A1.) In your My Documents\Neverwinter Nights\override folder should be a file called personal_switch.2da. Edit it in notepad and change the numbers labeled 1 to 0 or otherwise as desired. Once you start the game again, you can force the changes into a current game by opening the PRC Options menu and picking "1. Alter code switches", followed by "2. Read personal_switch.2da and set switches based on it's contents". Verify that it replaced the switches as given.

Q2.) It isn't working.
A2.) Navigate to "Steam\steamapps\workshop\content\704450\1647391559\override", and delete the personal_switches.2da there. The game gets very confused if it is in more than one place and the Workshop files are loaded after the Documents files.

It's an NWN limitation, nothing we can do about it.

As for Ur-Priest dual nines, I recommend Bard/Ur-Priest/Sublime Chord.

Anything with an item property, and any spell or supernatural ability (Incarnum, Psionics, Binding all count). ToB may or may not, some are supernatural some are extraordinary.

4.1.2
Bariaur, Hybsil races (by barmlot)
Wildren race
Winterhide Shifter trait
Eagle Claw weapon (by zae)
Basin of Deadly Dust encounter area

Switched Baelnorn stat gain to new EE function
Switched Lich stat gain to new EE function
Added new weapons to ToB Discipline Weapon list
Added new weapons to Swordsage Discipline Focus
Added new weapons to Warblade Weapon Aptitude
Added Blighters gaining caster level boost from ex-Druid levels
Fixed requirements for Tenebrous Apostate
Fixed TLK for Tenebrous Apostate
Fixed Heart of Fire Totem bind not applying fire damage
Fixed Totemist occasionally getting free binds
Fixed Restoration, etc., occasionally removing Vestiges and Melds
Made Incarnate Avatar more reliable
Fixed Hathran getting too many cohorts
Fixed Binding switch error
Fixed certain classes being unable to access Shadowbane Stalker/Inquisitor
Fixed Incarnum information not clearing all the time
Added new weapons to Weapon Master (by barmlot)
Fixed Wemic being the wrong size
Added weapon proficiency feats for new weapons
Fixed Shadowbane Stalker tlk issue
Fixed resting breaking when saving/loading during the cooldown
Fixed falchion and maul not being dual-wieldable with the appropriate feats
Fixed grappling occasionally getting into a state where it would do nothing

Overwritten

They're on your class radial where feats are located. Psionics do not use the spellbook as they are not spells.

PRC 4.1.1
Ur-Priest prestige class
Spell Focus (Alignment) feat

Switched Weapons of Legacy HP penalty to new EE function
Switched Crusader Delayed Damage pool to new EE function
Switched Alienist stat gain to new EE function
Switched Warchief stat gain to new EE function
Switched Acolyte of the Skin stat gain to new EE function
Switched Battlerager stat gain to new EE function
Removed incorrect Battlerager TLK entries
Corrected Dragon Devotee requirements
Switched Dragon Devotee stat gain to new EE function
Switched Eye of Gruumsh stat gain to new EE function
Switched Frostmage stat gain to new EE function
Switched Mighty Contender of Kord stat gain to new EE function
Fixed Blighter spell gain table
Added Blighter to epic spellcasting checks
Removed LA from Half-Drow
Fixed Greater Shadow Evocation mystery so it now shows all 6th level spells
Switched Cultist of the Shattered Peak to new EE spellbook
Fixed Pseudonatural Elder Water Elementals appearing as naked dwarves
Fixed Zceryll having a naked dwarf fixation above a certain binder level
Fixed Alienist Extra Summoning ability summoning nothing
Switched Nentyar Hunter to new EE spellbook
Fixed Rangers having levelling problems from 3.5 Two-Weapon Fighting
Switched Telflammar Shadowlord to new EE spellbook
Fixed Nentyar Hunter to grant all applicable weapon proficiencies
Switched Slayer of Domiel to new EE spellbook
Switched Sohei to new EE spellbook
Switched Vassal of Bahamut to new EE spellbook
Switched Blackguard to new EE spellbook
Switched Knight of the Chalice to new EE spellbook
Switched Knight of the Middle Circle to new EE spellbook
Removed incorrect spells from Knight of the Middle Circle
Switched Eye of Gruumsh to Bioware Blindsight
Switched Soldier of Light to new EE spellbook
Switched Ocular Adept to new EE spellbook
Added domains to Ocular Adept
Fixed Ocular Adept requirements
Added Corrupt spells to Blighter list
Switched Blighter to new EE spellbook
Removed incorrect spells from Healer list
Switched Healer to new EE spellbook
Switched Shaman to new EE spellbook

Means the textures aren't being referenced properly for them. That's beyond what I do with NWN though.