Wow, Pierre, have you checked your hacks to see if they were at all compatible with BV before playing the game? I feel your pain!
There is so much information available regarding hack compatibility with BV EP6. It's time for you to do a little research and editing.
You might start here:
http://www.insimenator.org/showthread.php?t=5606Also, you should try using Clean Installer to check for any duplication of hacks in your game. If you D/L S2P files sometimes they can contain hidden files inadvertently. Most likely these will be all pre BV and probably need updating.
If you use any of Squinge's mods it is imperitive that you check and see if they will work with BV as they are no longer being updated. The same holds true for Christianlov.