[andrewas]

Bifs contain the game data, this one (IIRC) contains the minimap graphics for the areas that are installed in every size installation. It should be in your data folder.

Did you install to the same place as last time? If not, part of the game may still be looking in the wrong place. baldur.ini contains some paths, try makng sure those are correct. Otherwise, install the ToB patch, and uninstall and reinstall the entire game from scratch.