The directory /var/spool/sw is useless to another server. This directory contains the history of software installed on the local system. If you were to use this same data on another system, perhaps to save some space, it would be quite likely serious problems would occur when running swinstall on the remote systems.
If you are trying to save disk space, use the cleanup command to reduce the number of superseded patches (man cleanup). If you are trying to make software bundles available to other systems for installation, use the swcopy on your local system to create a composite bundle. The use swreg on the local system to make this bundle visible to all other HP-UX systems (no NFS required or recommended).
Bill Hassell, sysadmin