SharePoint 2007 Bug: Importing a BrightWork Template Fails
When using stsadm.exe (or SharePoint designer) to import a BrightWork site that had been exported to a content migration package file (.cmp) an error is returned. This is due to a SharePoint bug and is beyond our control. To solve this use stsadm.exe to backup and restore a site collection or a site that has subsites. The disadvantage with this approach is that, because backup and deploy retains object GUIDs, you can only have one instance of the site in question per web application.
An alternative approach, for moving sites without any substitutes, is to use the native SharePoint site template feature.