Dwight,
First I glued the inclines and risers to the benchwork, using pins to hold them down. I then glued the cork roadbed to the inclines and risers, again using pins to hold it in place until the glue dried. I'm still doing my trackwork, so haven't glued the track down yet. I've got it held in place with pins as well. (Buy a bunch of "T" pins, they come in real handy). When I'm ready, I plan on ballasting the track and using a water/glue mix to cement the ballast in place and hold the track down as well. Then I'll remove the pins.
As far as the inclines go, my advice is to buy Woodland Scenics. I tried saving a few bucks by making my own inclines and while a couple turned out ok, it wasn't worth the time or mess. Save the money somewhere else. I did make my own risers (flat grade) by using different thicknesses of sheet stryofoam I salvaged from a variety of sources or bought at HD.
Doc