virtual gibbs solids

hi there

my name is jorg and i am machinist in ca.i used to work with virtual
gibbs for many years.but I decided to step up and learn virtual
gibbs solid modeling.the help buttons in the programm are not very
helpful.so, i am looking for a tutoral.by internet page or book.if
anyone could help me to find a manuel about virtual gibbs solid
modeling, i would appricated that.thx in advance
jorg