We upgraded to php 5 and used your code multiple times. We would have preferred the vBSEO option but you apparently haven't coded that yet and you didn't answer my pm, so that's cool.
You can also use multiple images with this as we've done on our own site, it requires changing the word "topics" in every copied file set of this code to whatever the multiple use is.
So we named them, news, videos, religion, etc. So that it would pull the image from a different file and allow multiple imagery with this, which is something we added to as your product didn't come standard with that. If people would like to see an example of the code to do this, let me know.
Shown here in application:
http://www.legionofangels.net