rear speakers conversion

[D1 WTF]

i have the pockets in the rear, and i have bought some speakers and frames.  do i need to change the back plastic trim (sort of door cardthing) to make them fit neatly etc  
also how do i go about getting speaker covers for these or does that come with the rear trim (if i need to replace it that is)
i havent really had a look, but are they easy to fit.  it appears like there is a big plastic pannel behind, so i didnt see what exactly they screw onto.  
cheers sam

[anthony]

best thing to do is buy some 6x8 kenwoods these are not very deep at all so require no modification and also have exactly the same screw holes :DD
do a google on 6x8s..

basically unscrew the old crud ones and prise them out as they glued in as well..
screw the new ones in and bobs your uncle

[D1 WTF]

sorry mate that dont help at all.
i dont have speakers in the back at all.  i currently have little pockets.
i therefore bought a set of 6x8s and a set of speaker frames.  once the pockets are taken out there is no grill for the speakers (to have this grill do i have to replace the hole rear door cards or can i just buy the grills) as it is just a hole.  and i cant easily see where the brackets mount to.