There are two directories in which VASP resides. vasp.4.lib holds files which change rarely, but might require considerable changes for supporting new machines. vasp.4.x contains the VASP code, and changes with every update.
There are also several utility and maintenance programs that can be found in the vasp.4.x directory for instance the
> makeparamutility. These files are not automatically created and must be compiled by hand, for instance typing
> make makeparamin the vasp.4.X directory.