that really isnt helpful? i dont see the need for petty wee comments like that?
6x9s are not as bad as you lot go on about! the reason they are so unpopular is people combine them with subs....a big no go!
however on their own, they are decent enough speakers.
they will give you adequate bass, something you wont get from coaxiles or components in the back!
with regard to fitting mate, you want to use the bottom of the speaker as a guide(sometimes there is cardboard you can cut out on the box to help)...then use a pen/pencil whatever....and draw out the shape.
then drill through the middle of the shape to start you off...then get a jig saw and cut out the oval shape.
then its a case of simple screwing in the speaker...then run the wire through to the back speakers....there is plenty gaps to fit through..easy if you look.
then just take out your rear coaxiles and join the 6x9s wire to the oem wire
hope that helps!