powermaniac on "[Plugin: WordPress MU Domain Mapping] Running two URLs to one install"

Basically, what I'm trying to do is have 2 domains point to the same wordpress installation. The links would need to change the domain to whichever it came from.

For example, wordpress is setup at domain1.com. There are links there, such as domain.com/about-us, domain.com/contact-us, etc.

When I visit domain2.com, it goes to the same installation, but needs to change these links to domain2.com/about-us, domain2.com/contact-us, etc.

I think this guy at the bottom of this link has it figured out, though I couldn't understand what he was saying:

http://wordpress.org/support/topic/one-wordpress-install-multiple-sites-how-best-to-set-it-up?replies=5

"For example. halfelf.org is actually tech.ipstenu.org, but via the mapping plugin, no one can tell :D "

https://wordpress.org/plugins/wordpress-mu-domain-mapping/