Hi Alex,
yes, it's Quest 4

I've managed to solve those two issues, although I used a different solution for the unlocking problem...
I have another question for you:
How can I have, in my inventory, a wallet with three bills inside?
The only way I found so far was to have a wallet lying around in a room and them pick it up, so that it can go to my inventory...
Thanks a lot once again!
All the best,
Vorjan