Some initial issues with setting up Domain Mapping...

I'm setting up a new multisite network and I've run into an issue. I'm going to wait the 48 hours.. but my question is: Is there anything else that needs to be done in the Domain mapping process, besides setting the A-Record? I did all that, but I'm not sure how to pull the domains into the network... is the Server IP. is the root domain.

Trying to map: --> --> --> --> -->

Any pointers on these first setup steps?