I didn't prepare a walkthrough file. If you really got stuck - you need to give the ticket to someone. :-)
In original scenario there was a bit more logic puzzle here, but I shortened it to make the game available on time for late submission. The mining museum was also extended and the Priceless Vase was in different place. There was some more puzzles, and also items in Basement and in the Car Park. I will introduce them for sure, but don't know precisely when.