So I keep running into the same (general) problems with an Expert install, now.
When attempting to import a character I get stuck at one of the BG1 recap cut scenes, the fight with Sarevok. For some strange reason I retain control of my character and can move around. Sarevok is unkillable and the scripts for the NPC players (both characters like Semaj and Angelo, as well as 'friendly' NPCs like Minsc and Jaheria) don't trigger. So I'm stuck.
When making a fresh character I'm able to progress through the above, but the game reloads the opening cinematic, but within the Loading screen and then crashes. I've noticed that the Soothsayer NPC for Exiles of Argentlune isn't spawning. Also, not noticing Shar-Teel spawning in her appropriate cage for NEJ (unless she's been moved to another location), which seems weird.