Help with Simple Map Plugin. Problem w/Mulitple domains and API Key

[nikig]

Hi! Not sure where else to get help with this, but thought someone here may know....
I put a Simple Map on my site and got the API key from Google for the map. However, I have several "secondary" domains. I have gotten keys for all of them, but not sure where to put the keys. In the meantime, anyone who goes to the site gets a popup says a new code is needed.
I found a code through google help for multiple domains, however I can't seem to find where to put it. When I edit the pluggin code, it just crashes the plugin.
Thanks for any help you can give!

www.nikigsbootcamp.com (primary domain)
www.bellemeadebootcamp.com (one of the secondary domains) Below is what I get with any secondary domain.

"This web site needs a different Google Maps API key. A new key can be generated at http://code.google.com/apis/maps/signup.html."