I know the stock speakers are really p.o.s....

but will I get better sound if I just change my headunit?

what kind of speakers can I install without making too much alteration to my door panels?

so the stock amp is behind the back seats?! how do I get to there? and are they any good??

one last thing...how do I pull out the stock headunit? thanks!

and yes...I've very limited knowledge about audio electronics...so please feel free to treat me like a dumba$$...