XenServer 6.5 Service Pack 1 introduces support for installing supplemental packs through XenCenter.
Supplemental packs are used to modify and extend the functionality of a XenServer host, by installing software into the control domain (Dom0). For example, an OEM partner might wish to ship XenServer with a suite of management tools that require SNMP agents to be installed, or provide a driver that supports the latest hardware. Users can add supplemental packs either during initial XenServer installation, or at any time afterwards. Facilities also exist for OEM partners to add their supplemental packs to the XenServer installation repositories to allow automated factory installations. For more information, refer to the XenServer Supplemental Packs & the DDK Guide.
To install a Supplemental Pack using XenCenter