Google Map Modification

I have google maps already set up with multiple markers and marker cluster source code set up. My JS is not strong enough to complete what I need done. I will provide the entire website and I require the following; 1- Cluster code put into .js file (I have the code and [login to view URL] set up but I am unsure where the code should be inserted into [login to view URL] file) 2- Var Labels altered so I can give each marker a name, currently it is set to var labels = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; var locations = [{lat: -38.270064, lng: 144.609824}, var locations = [{lat: -38.270064, lng: 144.609824}, etc. 3-marker changed so that I can give each one a .jpg or .png file if possible 4- identify where the snazzy map code is inserted I have enough html, css and JS knowledge so I can add to the base so you only need to set 1 up for each and I can duplicate it.