Overlapping Google maps

I have developed Google maps for my website sample of which you can see at http://urbackyard.com/mapping_data/grouptest.htm. My problem now is overlapping markers. I have tried unsuccessfully to integrate MarkerCluster which you'll find at http://googlegeodevelopers.blogspot.com/2009/04/markerclusterer-solution-to-too-many.html.

The arrays are all set and the maps function perfectly except for the overlapping issue. I have settled on the MarkerCluster solution as it seems to be the best performing of what's available.

The only requirements that I know of right now that I want is that I maintain the icons that you find on the webpage I sent you and I would create a new icon to represent the cluster. Are you interested in helping me with this? I am on a very short timeframe as integrating this code into my maps is keeping me from moving forward. I have dozens of these maps but they are all identical in structure. So if you can integrate MarkerCluster into the website I sent and send me the details of what you did to make it work I can apply that to the rest of the maps.

In fairness to you, I am going to contact other developers and whoever answers first will get the work. I don't think is a very big job but I have lots of other work pending so if we can establish a relationship there will be more work coming your way.

Thanks for your time

Gary