Susan, here's Skaggs' involvement:

Roses in the snow: banjo, fiddle
Wayfaring stranger: fiddle, acoustic guitar, harmony vocals
Green pastures: acoustic guitar, duet vocal
The Boxer: banjo
Darkest Hour: fiddle, mandolin, acoustic guitar, lead and harmony vocals
I'll go stepping too: mandolin, fiddle and harmony vocals (with Tony Rice)
You're learning: fiddle, acoustic guitar, duet vocal
Jordan: mandolin (also Albert Lee), harmony vocals (with Tony Rice and Johnny Cash)
Miss the Mississippi: fiddle, acoustic guitar
Gold watch and chain: lead acoustic guitar, lead and harmony vocals

Other musicians involved included Tony Rice, Albert Lee, Emery Gordy Jr, Jerry Douglas, Brian Ahern, The Whites and Linda Ronstadt (harmony and duet vocals on 'Gold watch').

--Stewie.