http://www.mud-master.com/shadowkeeper/
Just edit back up to relevant level. I am kind of stunned that there is a check on level cap there.
Hm could have worked. But I'm too close to the end now. I've done everything outside Baldur's Gate + Most of Baldur's Gate proper.
Hell of a lot of really powerful stuff for my character starting from the Cloakwood. There's the Spider Bane right away, plus the boots of speed, robe of evil mage, and Haste.
Then Baldur's Gate right away has arrows of dispelling + OHKOing Ogre Mages + tons of damage, plus a ton of really overpowered spells. Monster Summoning I&II, Minor Globe of Invulnerability, and a few others.
Yattaf can now open any lock for free with a spell, making the Thief part of Fighter/Thief/Mage even more useless. (Have I mentioned how awful Find Trap is?)
Really really powerful fighters can still be a treat against Yattaf, but mages are a non factor now. Minor Globe of Invulnerability completely shuts them down, as does Haste + Arrow Rain. Monster Summoning is also much appreciated in a solo game.
Not much has happened storywise, Yattaf did quests for people because while it's funny to give one liners to quest givers, they actually become far less inclined to actually offer quests.
Yattaf flooded the Cloakwood Mines with all miners trapped inside because gotta go fast. She really didn't want to go down there a second time warning everybody, understand that.
In Baldur's Gate she got poisoned (and not regular poison, PLOT poison), and had to give away a stat-up book for a part of the antidote. The irony was lost on her when she murdered the person she was trading with for a book of wisdom.