Remapping Thunderbird Shortcut Keys to be Like Google Reader's

I recently upgraded to Thunderbird 3, and probably accidentally marked a good 50 messages as junk because that’s what the “J” key does in TB3. But I’m so used to J/K being used for “Next/Previous” in Google Reader that I couldn’t help myself. The keyconfig extension fixes it, in case anybody else out there is having the same trouble.