I am currently setting up TimberCAD on my ver14 machine but wonder if YTHONG,s recommendations work with AutoCad2004LT or is the full version required?

Its doubtful Randy, I don't believe AutoLISP functions in LT. There is a program called Intelli-CAD which is an AutoCAD clone and a free download, but it has limitations. I believe TimberCAD has been found to run with IntelliCAD but it loses some functionality. IntelliCAD doesn't support clipping planes if I remember correctly.