Someone on our computer forum asked how to compare the file size difference between 2 files, in Directory Opus. Off the top of my head, I couldn't think of any built-in functions in Dopus to handle it for him, so I whipped up a script to do it, and thought I'd share here as well. 
You just select the 2 files that you want to know the difference in size of, click the menu item, and it'll grab the file sizes and pass it to Google, to do the rest, in your default browser.
Here's a link to the source code (VBScript), screenshots, and step by step instructions on "installing" it: