I am using AutoCAD 2008 lite at the office.
I know that it doesn't have the bells & whistles as the full
version (which I would have if it was up to me).
I can draw isometrics with no problem, but is there a way of
shading with the lite program?
I think that is one feature that was purposely left out of LT in order to keep on cheaper side. Most work in LT is aimed at 2D development. You may have gotten a bit further than they intended for you to go.