On-line manual pages compatible with most Unix machines are shipped with the source distribution. These reside in $PVM_ROOT/man and can be copied to some other place (for example /usr/local/man or used in-place. If the man program on your machine uses the MANPATH environment variable, try adding something like the following near the end of your .cshrc or .login file:
if (! $?MANPATH) setenv MANPATH /usr/man:/usr/local/man
setenv MANPATH ${MANPATH}:$PVM_ROOT/man
Then you should be able to read both normal system man pages and PVM man pages by simply typing man subject.