Overriding Domain Mapping only on SSL/secure pages?

Hello. I am using domain mapping plugin with the e-commerce plugin. I need some blogs to have both mapped domains and secure connections to certain pages (e.g. checkout page). Have subdomain setup, current version of domain mapping plugin & WPMU.

To get around the issue of dedicated IPs for the SSL connections, I set up a wildcard certificate for wpmu.com / *.wpmu.com and am fine with having the secure pages *not* mapped, as long as the rest of the site is mapped. The pages need to be un-mapped to keep from throwing a big, ugly certificate mismatch error.

I'm not sure how to override the domain mapping only for the secure connections. Would an .htaccess directive work (and if so, could anybody help me with it)?

Thank you.