I can't say anything but "Reinstall".
1) Uninstall Baldur's Gate and Baldur's Gate II
2) Uninstall Baldur's Gate and Baldur's Gate 2.
3) Delete the Baldur's Gate and Baldur's Gate 2 directories
4) Install Baldur's Gate, choose Custom install and install ALL components, install to default directory.
5) Download and install the Baldur's Gate patch.
6) Install Baldur's Gate II, and choose Full install, install to default directory.
7) Install ToB, choose Full Install, install to default directory.
Download and install the BG2: ToB patch.
9) Download Tutu and unzip to C:\Program Files\Black Isle\BGII - SoA\
10) Download
RNDEQUIP.2da and place in C:\Program Files\Black Isle\BGII - SoA\BG1Tutu\bg1-override\
11) Double click the Tutu installer EXE and follow the prompts.
12) Click BGMain.exe and play Tutu.
Additional: You may want to install the Tutu Fixpack, and it doesn't seem you have TotSC, which is required for the Core Fixes, the main component of the Fixpack. But there is a workaround...
1) Open up setup-tutufix.tp2 in Notepad.
2) Comment out (put // in front of) the following lines (use the "find" search feature to find the lines):
~_BAYARD.CRE~ ~override~
~_KING.CRE~ ~override~
~_MARCEL.CRE~ ~override~
~_QUEEN.CRE~ ~override~
~_CHAN07.ITM~ ~override/CHAN07.ITM~
COPY_EXISTING ~_BARESH.CRE~ ~override~
~_BARESH2.CRE~ ~override~
~_SKELDED.CRE~ ~override~
~_CORPSE1.CRE~ ~override~
~_CORPSE2.CRE~ ~override~
COPY_EXISTING ~_MISC1H.ITM~ ~override~
WRITE_ASCII 0x44 "_GBLUN06"
3) Save the file.
4) Run setup-tutufix.exe.
5) Install Core Bug Fixes component.
Note: The post before this one was made by accident, please disregard it.