ive had this idea for awhile now but didnt want to test it out untill i got another hatch cover (just in case i screwed up) so i picked one up on the weekend and started brainstorming how I was going to go threw with this, adding my 6x9 pioneer speakers on the hatch cover.
first i got the outline for the speaker from the box (had an outline cutout 
) then i traced it with a white pencil crayon, at first i tried to use an exacto knife… hahaha that doesnt work to well, then tried cutting it with some heavy duty snips, but that didnt work either, so i went to my dads workshop and saw a jig saw. now this worked awsome.
Items you will need:
Hatch Cover (obviously)
Speaker Outline (mine was a cut out on the speaker box)
White Pencil Crayon
Jig Saw
… and anything else you may think you want to use. but those are the basics.
any way ya it was really easy to do here are some pics of my progress.
hatch cover
my outline with the cardboard outline cutout.
these will be going in the hole when i cut it out
yay my first hole cut out, now for the other one.
both holes done
and the test fitting
(wrote this up right before i went to work, so its just a quick job, the writeup that is, the cutting the holes i sorta took my time)
and thats all i got for now.
brad.