IIS6 to IIS7 while not replacing the IIS7 Default Site

I have sites in IIS6.  I removed the Default Site from IIS6 before Archiving the entire config using MSDEPLOY on lm/w3svc (config only, no content).

I want to keep my Default Site intact in IIS7, because it has my CA enrollment stuff all setup and in place.

When running MSDEPLOY on the IIS7 server to bring in the IIS6 config, it overwrites the entire IIS7 configuration and I am left with only the IIS6 sites.  The IIS7 default site is now gone.

Is there an "append" switch or a specific skip rule I can use to NOT delete the IIS7 default Web Site when importing the IIS6 sites using MSDEPLOY?

Thanks,
Ken