Domain Mapping DNS and install help

I need a clarification…the plugin at (WordPress MU Domain Mapping) does not need to be installed to make the WPMU DEV Domain Mapping plugin to work, correct?

I know how to enter the DNS info but I not sure how to enter the wildcard text, can someone please show me an example? i.e http://www.domain.tld* or domian.tld* or *domain.tld, etc.

I have a hosting account on a shared server. I have the DM plugin running but I am not sure how to map a site

I added the shared server IP in Network Options section but I am not totally sure what the domain used for the administration area should be set to or the difference between the three.

After this is setup, then what?