There are some options which can be tried separately or in combination:
(1) Take a look at the Hudson PVCS VM plug-in and see if it meets your needs. I have not used the plugin.
http://wiki.hudson-ci.org/display/HUDSON/PVCS+SCM
"This plugin provides integration with Serena's PVCS Version Manager SCM."
(2) Another approach, if you use Ant, would be to use PVCS Ant tasks.
http://ant.apache.org/manual/Tasks/pvcstask.html
(3) Alternatively, your Hudson job can configure and run the necessary command line actions or call a custom script that does what is needed.
