I changed mine (93 YJ), well had a good friend do them for me (smaller hands). Its a pain in the arse to do, and its only a 4X6 speaker, so the sound quality out of them isnt that great to start with. My advice, leave them there, clip the wires and run a set of 6X9's in boxes in the back.
Unless you are into self torture and aggravation, if so then go at it, lol
Just my 2 cents