I'm not sure if you could get the deployment utility itself to pull it in, but you could definitely modify the MSI file created by the deployment utility. The following tutorial is for CVI, but it lists ways of modifying an MSI file that you can probably use with the TestStand installer.
http://zone.ni.com/devzone/conceptd.nsf/webmain/2FF2B17F4DC7CFDF86256AA3006990C4?opendocument
Regards,
Ryan K.