Hello SoI. I remember you from the Bioware forums.
Nice! I'm totally new in posting here I see, though my account on this board exists for some time.
Has Beamdog published any specs in terms of how their edition differs from BG1 from a modding perspective?
I posted your question on the Baldursgate.com forum: http://forum.baldursgate.com/discussion/comment/205761/#Comment_205761
I wouldn't know the answer myself, I'm not a modder, just some player that's addicted to using mods. I do like some of the things that are done with the Enhanced Edition and the things that are dislikeable about it are being worked upon. Patches appear in rapid succession. There's been some 4 patches already in only 3 weeks after release. Not only fixing the game-breaking bugs, but also in response to fan feedback, about monster spawn rates and the intro movie for instance (Nietsche's quote is back).
I can't offer any help but posting your question there, but there's a lot of modders active behind the scene in close cooperation with Beamdog, so if you need specific help, you can find people like Avenger_teambg, CamDawg, cmorgan, Ascencion64 and others I forgot to mention on http://forum.baldursgate.com/categories/modding
if you want more tech-info about the game.
For know I'm hanging a bit low with BGEE. Things like improved journal system, each character it's own selection circle color, auto-adjusting dialogue box, bug-fixes, new characters and area's are nice, but for me it won't really be an enhancement without the NPC1Project, SCS, RR and Hard Times of course, among others. You modders are still indispensable!
(and I'm still playing Tutu, I absolutely love it