XSDT is a Citrix XenServer Deployment Tookit
please see http://www.xsdt.org
mkvm.py is a python application that tries to tie Cobbler (https://fedorahosted.org/cobbler/), Puppet (http://www.puppetlabs.com/), and Citrix XenServer (http://www.citrix.com/xenserver) together to allow automated virtual environment rollout.
pypxeboot is a bootloader for Xen guests that simulates a PXE client. pypxeboot runs on the Domain 0 as part of the creation of a new domain, and requests an IP address and configuration information on behalf of the as-yet uncreated guest (DomU).