Originally Posted by ATDrake
You want the latest version of Mobiunpack
in the Mobipocket forum and you want to use the split option to separate the Mobi & KF8 portions.
You can run it from the command-line as well to batch process multiple files. You may also need to use Kindlestrip to trim the included source files as well. IIRC, it's included with Mobiunpack.
Thanks! I've grabbed the latest version and am ready to go (I hope).