Using g77 instead of gfortran in FC4

[rab <rab@xxxxxxxxxxxx>]

gfortran won't compile R packages for installation (plus the man page 
says it is not really a complete Fortran compiler). I removed gfortran 
and have installed g77 but now when I try to do an R package install, it 
still wants to  use gfortran. How do I get the system to use g77?

Rick B.