Domain Mapping and Shared SSL

Hi All,

Can I make an original URL for a site resolve that has the domain mapping installed?

For example, I'll setup a membership site at example.com and allow people to create blogs/sites using the subfolder option (so blogs would be at example.com/blog1 and example.com/blog2). Domain mapping will be installed so they can choose to make their site be their own domain like blog1example.com.

I want to setup shared SSL certificate on example.com and I would like it if the contact page of the sub-sites would also use that certificate. So my question is...with domain mapping, I specify which pages will resolve with both URL's? For example, I would like both https://blog1example.com/contact-us and https://example.com/blog1/contact-us) resolve to the same page.

I know this introduces duplicate content, and I would prefer to pick and choose which pages this works for and have the rest automatically redirect.

Thanks!
Craig