I haven't tested this with your chests mod yet, but I don't think it will be a problem.Very cool, I'll have to give it a try at some point to see how it works.
I think attempting to bash a shop door should have a chance of summoning the city watch. I could add that code to The Penwick Papers, but I think it would be better to add it to another mod, like Ralzar's Skulduggery.