[Coco] I am a dirty coward. Give me courage.

[Juan Castro]

I bought a bunch of cartridges like this one: http://i.imgur.com/dkWPr.jpg

I want to open them up to maybe play with ROM replacing, but after
taking off the screw the two halves seem to feel no inclination to
come apart gently. I don't want to break them. What's the best way to
do this?

By the way, all of them work and I want to save the ROMs for
posterity. There's a Space Invaders-like game, an AstroBlaster-like
game, this one (Bust Out), a simple math game, and a... spreadsheet!

Juan