One simple thing I like to do in these situations is simply turn off all unnecessary layers, even flat-colored bg layers, and get your psd looking like you want it, then select the whole canvas, and go to EDIT > Copy Merged.
Then simply paste that data to a new layer. Done.
Works for layers with transparent areas, with/without layer styles as well as layers with multiple different transfer modes, etc.
Good luck
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com