The page you have created is a guide for installation and basic use on Ubuntu. If you intend to keep it as such, rename it to something that indicates it is an Ubuntu specific install. There are several things you talk about that only exist on Mythbuntu, and will be confusing to non-Mythbuntu users. If you would rather keep it as a general howto, those bits must be removed.
Do not directly link images that large to a wiki page, and especially do not link that many of them. You are trying to show people where go go, not showing off graphics. There is no reason to be using such high resolution images, nor reason to use lossless PNGs instead of JPEGs.