I heard the re-parenting in this Excel file.
I also want to know how re-parenting work in WSS3
To me it's also not clear enough what you would like to do.
Do you need to move the whole site collection under another existing site collection? Moving sites within a site collection is possible in SharePoint Designer as well as via the interface in MOSS.
Could you give more details on what you require?
Yes, how can I move a whole site collection (or subsite) to another existing site collection in WSS3(not MOSS) without using SharePoint Designer.
Thanks
I'm not sure that is possible.
Moving sub-sites within the site collection is possible via the interface menu entry "Manage content and structure" in MOSS (not in WSS as far as I know).
However, I have not yet found any information on moving a site collection or sites between two site collections. I assume you can accomplish that via the object model.
One thing that might help is looking at the Content Deployment feature in MOSS, there is some info in this blog post: http://blogs.msdn.com/sharepoint/archive/2006/05/02/588140.aspx