I'm very sorry but I'm obviously missing something. I did read the content from the link and watch the video but it doesn't seem to pertain to the exact thing that I'm trying to do. You mention "change the logo" but that is the particular issue. I can change the 3 parameters of the logo but there is nowhere for me to assign the logo the 2nd logo. My only options in gantry are show on/off, position, and auto-size on/off. So exactly where do I assign the second logo? Again I'm very sorry if the answer is right in front of me and I'm not seeing it. Sometimes that happens.

Under Type select custom and a second area called Logo Picker will appear bellow. Again check the box on the left to indicate you want to use the logo picker as an override and click Select to choose a new logo, either through the Media Manager or RokGallery if you have it installed.