Anyone here ever use Google Maps API?

I'm a designer who needs a little bit of help with these maps.

I have the beginnings of a map here:

http://www.trailcon.com/map.html

I need to be able to displace a logo or picture and links inside the info windows. I also need to be able to change the marker so that there are 3 different sorts. I think I can handle that part, but the links and pics in the info window are giving me a headache.

I'm not really a programmer.

If anyone can help me figure out this code, please let me know.