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I believe brown's camera driver comes precompiled for a specific disk image / NaoQI version. If it doesn't exactly match your version it won't work.

For walking, maybe the axis mapping is different on a ps3 joystick. I am usually using a Logitech Cordless Rumblepad. Are you starting the ps3controller.launch file from the nao_remote package? That's the one translating joystick axes into walking commands.

Can you try to rostopic echo /cmd_vel and hit a few axes on your gamepad? That is the topic which is sent to the Nao as walking velocity. Otherwise Daniel could maybe tell you more, as he's also using a ps3 gamepad with Nao.