Maps install question

[Tahoe]

I read the very brief instructions that came with the maps download..."Unzip EQ2MAP.zip into your custom UI folder with zip folder structure (use folder names) enabled."

I have a UI folder but no custom UI folder. Do I need to creat a custom UI folder? If so where? If I just want to use the standard UI will there be any problems or do I have to use a custom UI to use maps?

Thanks,
Tahoe