there are several bust scripts available.
In one of the ReStaff archives is Fomars Bust script - that is the easiest to use (no configurations or commands neccessary, everything is automatic).
Modern Algebra's ATS Face Options has the most advanced options for face and bust display - including animations (that of course needs the most complex preparations and commands)
Galv's Message Bust script is somewhere in the middle - you have only limited options to use, but have only a minor numbers of commands as well.
The first has to be downloaded with the ReStaff, the other two are on the master script list.