I have a resolution of 1280x1024 but never maximize my windows as I like to keep some things always visible, and most sites fit nicely in a smaller window.
So your screenshots do nicely showoff everything that is part of your skins, but they do require far too much scrolling I think. One shot should be enough and then a good explaination. That said, there are certainly screenshots that suck and don't tell you enough about the skin.

So continue with your big screenshots I think, its a little slow for me on dailup, but then again its not that much different than a normal size screenie.