http://blogs.technet.com/b/configurationmgr/archive/2010/05/06/how-to-use-a-collection-variable-to-prompt-for-a-computer-name-during-an-os-deployment-task-sequence-in-system-center-configuration-manager-2007.aspxThis information is actually part of a KB article that recently got the OK for publishing but since it might take a day or so to show up I thought I'd throw the meat of it out here. Note that when it does go live you should be able to find the completeen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/configurationmgr/archive/2010/05/06/how-to-use-a-collection-variable-to-prompt-for-a-computer-name-during-an-os-deployment-task-sequence-in-system-center-configuration-manager-2007.aspx#3335178Wed, 02 Jun 2010 02:50:23 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3335178sunarhadi<p>I used it in all unknown computer collection but only works on non-mandatory task sequence advertisement. Also modifying existing advertisement to non-mandatory didn&#39;t work so I have to create new non mandatory advertisement.</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3335178" width="1" height="1">