Can anyone recommend a good runtime cleanup tool (if there is such and animal)?

Basically, I'm looking for something that can search my various runtimes and collect or move the elements together into the same runtime (right now for example, I usually keep the geometry files and the textures in one massive runtime separate from the others) and/or correct any missing, damaged or otherwise "broken files" (curse you .BUM files!!!). My various content runtimes have blown out to at least 100gb at this point, and I think it's time to slim them down as Poser is seriously chugging on it at this point. Any help or tips would be appreciated.

 I'm at about 80 gigs and had the same problem.

My own solution was brute force. I started over.  

I first sorted my poser item install files into the various runtimes I wanted to create, then used the 3D Content Installer ]http://market.renderosity.com/mod/bcs/index.php?ViewProduct=61876&keyword=installer
to create the runtimes. Once I had everything sorted, it took just a few hours to create the runtimes, and that was walk-away time included. This is about as close to automatic as it gets, and creates a good, clean runtime.