Any one know how to diss-assemble a key fob without destroying it or sawing it in half...

I can get the battery button cell cover off easilly enough, but it stopped working after dropping the fob, so I want to open it up and take a peek inside at the circuit board.....
I've already prizes off the logo badge on the fob, and there isnt a screw under that....

Any one got any ideas before I end up destroying the unit completely ?

Is there a link or thread on this one ??

Regards
Grant B