Have a look at this article. http://community.landesk.com/support/message/77683#77683
According to this the command line is "/s http://coreserver/landesk/managesuite/core/core.anonymoushttp://coreserver/landesk/managementsuite/core/core.anonymous/ /h" (the article has a few typos in the path)
It does appear to work but still not 100%. It seems that there can only be a single conection to port 9971 which means only one PC can be provisioned at a time so sometime you will see it try to connect three times then fail.