Subdomain BaseUrl Variables

I have an issue where I need to have different baseurls and secure urls per domain.

I checked the latest dev release, and I see that the switch in Urls is made in function securepages_baseurl($secure = TRUE) starting on line 306 of the module file, but other than hacking this function, is there a better way to add multiple subdomains to Securepages?

Currently, the user is redirected to only the domain that is listed in the admin form.

I saw some connection to the Domain Access module, but we aren't using that suite of modules currently and would rather just find some way to modify the Securepages module and make it work.

Thanks for any thoughts on this!