New to PHP

I mentioned earlier that I recently switched my site over to PHP. I had a couple of reasons for this: 1: I was using Server Side Includes, and had been told that PHP includes were better and definitely more popular. 2: I began sending out a newsletter which was written by someone else in PHP. I am beginning to wonder if this was a good idea. I can no longer preview my pages without uploading the files to the server. This can really become a problem when I am making slight formatting changes to my CSS file where I need to refresh the page every few seconds until I get the look just right. Is it really worth changing all the files to PHP files and using includes? Is there any way around this, or am I stuck uploading?? Thanks, Jedidiah