Re: How Do I Hang Picture Rail?
Most walls are constructed with a double 2x top plate. The first ties the studs together, the second is a "collar tie" which ties all the walls together once they're stood up and in place. Odds are, if you've already got crown, you'll be well below both of those 2x's and relegated to finding the studs in the wall.
I don't believe that construction adhesive is going to be of any value here because of the trim dimensions and it's small footprint on the wall. I'd also have some misgivings about relying on the plaster to help hold it up.
My first recommendation would be to install the new molding in the same manner that the old was, if that lasted 75 years, it couldn't have been too bad. After that, I'd be inclined to install a backer or ledger strip to the wall with screws into the studs, then attach the molding with glue and nails to that. This will provide much more strength and holding power than a mere nail in the wall, as well as beef up the molding to withstand the load of pictures without warping.
Jkirk is probably the better one to be asking this question, he's the trim man around here.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!