What I think happened is that (g3) fixpack over wrote BGT's map. I think it would be best if you start over with a new fresh clean install and try this install order.
A6 Charmpatch
(g3) fixpack
BGT
bg1 txtmusic
bg1-ub
spells 50
scs
bg2-ub
scs2
xp-cap lvl 50
BGT tweaks
Ah thank you I will try that. I play with wine on linux and have to copy the installed game out of a virtualbox so its not done that easy but it seems to be the only way.
There is still the issue with the long loading times and a noticeble delay when managing spells or inventar but that could be scs i think.
I play on laptop with a 1,5G CPU so my mashine maybe cant handle the additional scripts.
edit: ok, worldmap works in this order. xprewards.2da is messed up put that repairable.