Solved: How to open HP 6730b laptop

I have an HP 6730b laptop. The CMOS battery came loose and fell inside, I can hear it moving around and I need to open the case to remove it. I've searched on YouTube (and watched videos on other HP models, but they're not the same) and HP help sites but cannot figure out how to get into the lower portion. I can removed the keyboard, the CD drive, RAM, etc, and I've tried removing every screw in site without success.

Any suggestions on how to get step by step instructions?