You're right, I was really missing something obvious. It was the fact that you have to be crouching *before* starting to climb the ladder that bit me. Thanks a lot for setting me straight!
This did not happen on the Tremere playthrough, tat I played just before the Malkavian one. and the only difference was that heather is still alive on the Malkavian file.
Apperantly the game does not like you going into the last part of the game with over 100k blood points from messing with the console, which is wierd since i could go through the entire game with that insane ammount without any problems :S
naah leave the possession issue it as it is, useful to have him just drop dead after a while
As for the grenande, I had a full inventory of Ranged weapons so it dropped giving me only 1/1 and 0 in reserve, that might be the cause
How bout this then, Leave the fix out of the + Patch and remove it in the basic, just like you have done with other exploits