http://www.cataclysm.glyphgryph.com/smf/index.php?topic=159.0
For now you should try that. It removes special infected (aside from fast (slowed down to be around your speed) and brutes (renamed athletic zombies)), but it also removes a large amount of non zombie monsters, like aforementioned triffids and fungaloids.
It’s probably not exactly what you’re after, and chances are that you’ve seen it before, but it’s the only thing I can think of to give you what you want quickly.
Sorry if this wasn’t what you’re after!