Mambo / G2 installation instructions? NEW

Good afternoon. My name is GEMOTORS and I have a Mambo 4.61 website and need a photo gallery for my viewers to see. I have no idea where to begin with this. Can anyone tell me how to get this program loaded and working from my Mambo site. I know of older versions of Mambo working but haven't heard of the new one working. Can some please help me get this working on my newsite. Thanks GEMOTORS