The least painful way to build the SLIC simulator package is using the SimDist CVS project.
This is the procedure.
cvs -d :pserver:anonymous@cvs.freehep.org:/cvs/lcd co SimDist cd SimDist ./configure gmake
Depending on your system speed, the entire build process will take around 2 hours.
This is currently a "work in progress" that is missing a few options, such as OpenGL visualization in Geant4.