My house is a 1920's bungalow with some plaster walls. I'd like to build a closet in the corner of a downstairs bedroom - one wall plaster, one drywall, and a dropped drywall ceiling. I'm wondering about the best method for tying in the new framing into the plaster wall as well as the dropped drywall ceiling. I was thinking toggle bolts, and not worrying about hunting for studs, but will that provide the walls with enough stability? Do I need to find studs through my plaster walls to tie in the new framing? Do I need to consider removing the plaster altogether (i don't really want to)? Thanks for any guidance.