A plain old fashioned regular html page can easily grab the look and feel of your skin by telling it to use the stylesheet from your skin. Typically it'll be at your_path/skins/your_skin/stylesheet.css (but frequently the stylesheet name is whatever it might be). Anyway all you have to do is tell your page to use that style sheet, then make sure your page follows the divs and classes you see on blog-generated pages. Easiest way to do that would be to look at the source code from one of your blog pages and save it as "testing.html", then upload that file and see if it's working in the location you want for your non-blog page. You might have to tweak the path to the stylesheet is why you would test first. After that you can edit the page to be what you want, and in the process become very familiar with the basic structure and ids/classes used to make your skin work.

Hope it helps!