BGtutu seems hunky-dory
I've downloaded BGtutu from Fable's link (thank'ee kindly, Sir!) and it seems to work fine.
The only issue I've come across so far is that any NPCs I've encountered are all first-level (am pretty sure J. & K. were 2nd-lvl when first I played). However, this may be because I installed the character Kits, which are optional.
BTW, some BG features still apply - eg. max stacking for arrows, etc. is only 20.
Note that you cannot start using an existing BG Save, though you can Import the PC from one - the game starts in Candlekeep, as usual.
Wish I had a decent sig...