I am new to car audio systems. I have an 88 maxima se and the speakers are dying fast. I just bought an Alpine CDA-9805 head unit and Infinity Reference 6.5" and 4". My setback is I dont know how to remove the factory speakers and head unit. I would like to do the speakers myself and the head unit(if possible). Can anyone tell me how to do so, or know where i can get the information i need?

thanks