iframe alternative

I'd like to add some content to pages on my site without having to edit each page individually. The issue is that I also want search engines to just think that content is a part of the page. To be more specific, on a page with articles I'd like to add a "top 5 articles" section that I can change without going through every page on my web site that particular set of 5 shows up on. However, iframes are separate pages (and I hear google even ignores iframe content completely) which I'd imagine causes quite a bit of trouble if I'm trying to pour all my PR into a handful of pages (which is the main point of doing this).

Are there any css alternatives? I just need to be able to write one or more anchor tags in a separate file. In particular, I'd need the XXX sections from the following example in a separate file:
<a href="XXX">XXX</a>

Any suggestions? I'm willing to use cgi/php, but I'd rather not since I write and test stuff offline on different computers and i don't want to have to install a server just for this (which I can't take with me anyway).