taking stock head unit out..help!

I recently bought a 91 ford probe and I'm trying to take the stock head unit out so I can put the one I bought in. Does anyone know how the heck to get it out. I have already broken all the plastic around it and I have no idea how to get it out. If there is some kind of locking mechanizium holding it in, tell me how to get it to let go. Please, help.:banghead:

theres too little holes on each end of your tape deck stick coat hangers in it and it should silde rite out