I guess you're write Swirlee, I probably wouldn't do somethign like that for PHP and HTML files. The solution usually comes from expanding or minimising a problem, in this case it show's it may not be too good to do it.
With images however, I don't see a matter of anything - An image editing program will open all of the files the same. I can't see a situation that it would cause a problem.
The new computer nerd is a funny thing - a brilliant being. Good on ya yankee. When I was 14, in fact when I was 12 - I was working with websites, very mediocre ones with no coding, but it was still websites.