you're gonna need a really small screwdriver if i remember right, the back window doesn't help when you're trying to get the screws out. mine were replaced before though, the guy that did it was a f*cktard. broke the rubber clips on the seat and stripped two screws, like i said replaced two with philip's heads. he put some kinda putty around the middle tweeter too, it was weird. all in all, not that bad. the head unit was tricky just because of the plastic trim. i couldn't get it all the way off. and it might have not played the CD because it's a CD-RW intstead of a CD-R. older stereos have that problem reading the format. i also cut the tweeters when i replaced the front, defintely DON'T do that unless you have really good replacement door speakers. i recommend pioneer over sony. as for the back ones, did you get the $70 dollar sonys or the $140?