Here's an online clinic on scenery from Joe Fugate who is well known for his magnificent Siskiyou model railway. He also sells a CD with much more detailed information on it.

OnLine Scenery Clinic

Looks like an interesting site Bob - he's certainly a pretty accomplished modeller. :thumbs

It's quite a long tutorial and covers the broad strokes of scenery making. He obviously leaves all the details for his CD. It's a good read though.