Pervasive v9 can be installed on a virtual machine, but support is another matter (http://www.pervasivedb.com/support/Pages/Support-Lifecycle.aspx). Support for it ended in January 2010. If you need documentation on how to set up a cluster, the documentation is still available under Archived Documentation here: http://www.pervasivedb.com/support/Pages/Documentation.aspx. The section you need is in the Advanced Operations Guide.