Hmmm....
I've seen 'em posted somewhere around here... Can't find it. If no one else can find 'em for ya, I'll snap some pics and write some instructions up for ya tomorrow after I finish up the MSF course I'm taking this weekend.
Basically, if you're looking at the back, the bottom piece will come off first by removing the two black plastic rivets. (You can deffinitely find how these rivets work with a quick search, they're simple) Then to remove the bottom piece takes some finesse, but you'll have to pull straight down. It's hooked in there.
That'll reveal the hidden two plastic rivets you'll need to take out, along with the two rivets on top underneath your seat. This piece pulls straight back and slightly upward. It's this piece where the X's mark the spot. You'll also see a nice frame under this piece of plastic with three bolt holes where the bars/trunk/whatever you're mounting gets the physical attachment.
Ok, I suck at descriptions when I don't have 15 hours to write the paragraph properly.. I definitely do better with pictures.
Well, if I've totally confused you, and no one's straightened me out before tomorrow, I'll get clear and concise instructions up.

Guess I shouldn't even be typing after going 8.4 miles in 6 hours on a bike that's WAY too small for me. Ugggh.