I seem to remember there was a mod so you could give the npc's a kit (turning a fighter into a berserker for example).
But I don't remember the name of the mod. Is there anybody with a link?
is this mod playable with bgt and when should you install it (after putting both games together or before?
There's Level1 NPCs
, it can be used to not only give kits to NPCs but to pretty customize anything but their stats to your liking AFAIK. It should work fine with BGT.
There is also the NPC Kitpack
, but I'm not sure that one would work all that well for BGT since it only modifies the BG 2 version of a few NPCs.