With Justice's permission, I've continued the development of this great app. The original version didn't do quite what I wanted so I learned the programming language and made some changes. You can download it here
along with the source code.
It's likely that there are some bugs in here so consider this version (v0.92) a beta release. I'm happy to deal with any problems that people find and I'm happy to try and add new features. I'm not quite done with it myself yet, but I thought I'd get this version out there and see what people think. I'm away for the next week, but I'll catch up on this when I return. Enjoy!