I always catch myself looking for this information when I need it, so I thaught: why not post it here.
Logon as Administrator
Open the WSS site to be copied in SharePoint Designer (SPD)
in SharePoint Designer, select the menu option Site -> Administration -> Backup Web Site
Choose if you want to include subsites. Click OK, then enter the path where the backup files will be saved, and give the backup file a name. Note that the file type will be Content Migration Package (cmp). Click OK to start the backup process; wait for it to complete, then click OK.
The you need to create an empty site, that is, a site without a site template. For this, you need to use the STSADM tool. Open a new Command prompt and type the follwoing command to create an ampty site with teh URS http://server1/Sites/abc: stsadm -o createweb -url http://server1/Sites/abc.
Open the new site with SPD. Click File -> Open Site and enter or brwose to http://server1/Sites/abc. It will be empty, except for some default folders.
Click Site -> Administration -> Restore Web Site, then browse to the cmp file you created in the previous steps and click OK to start restoring the site.
open the new site in a web browser and verify that it is to correct.
Finally define the permission settings for the restored site, since these settings are not restored.