Removing/Unplugging Sat Nav

Hi I want to unplug my sat nav as my stereo isn't working properly, the sound only comes out of the rear two speakers and I cannot change the volume. I read here that disconnecting the satnav might fix the problem. I have a 2001 P38 4.6 vogue.

In Rave it shows a tool tSMD 4091 to unclip the front of the sat nav computer. What can I use instead?

Never mind I did it and I fixed the problem....bit of brute force and wasn't the tidiest job ever but the sat nav's obviously buggered anyway.