All, thanks for your earlier answers. I was still getting missing icon errors when I was opening the C3C editor (since you correctly told me I was foolishly opening the vanilla editor - DOH!) and when I tried to generate a random map, it would crash and close. So, I reloaded C3C and it seems to be working again (although I haven't re-tried any of the mods yet, one thing at a time).
By the way, before I go any further, I did try to find the answers to my questions in the "Creation and Customization" forum, but couldn't find them (frankly, they seem one step beyond my beginning skills). Also, I just tried to chat online, and, although there were two dozen or so ppl there, only one responded, and he didn't know anything about modding maps. So, I have returned to where I have found success (and knowledge).
At this point, my question is, how do I create my own map so that when I open it in Civ Content it will generate a random map (the way Snoopy does)? To be clear, I can make a map, save it, and open it, but I want to be able to generate a random map each time I use the changes I loaded into the units (more cost to build settlers and workers, simple things like that).
Finally, I realize this isn't the forum for this question, because it isn't to do with this Modpack. So, please feel free to tell me where I should go to successfully get this assistance. After you answer my question, lol. Thanks, really, you have been helpful in the past.