Well, I got the 6x9 speakers in the spot I wanted... Now before you say why don't I just mount it to the outside, I don't want my eagle broken into, so I'm hiding the speakers behind the interior trim, and cover it with something that doesn't look like there's speakers behind it.
I got the only thing I could find to pad the panel - I got some underlay for carpet, and then I glued it in to pad the area.
then, I made a cardboard cutout (several tries...) and cut the MDF in the same shape (That too a few tries to hone it)
then I lined up the plastic boarder for the speaker and marked out where I wanted the hole:
Now, since I was mounting the speaker behind the MDF (to get it to sit behind the plastic trim) I cut it out, and mounted the speaker, and then slid it into the hole, just to make sure.
Then I made a copy of this template, marked the main hole, the screw holes and the like:
Now I have two exact copies, and I can mount the speakers to them,
then I cut a length of speaker wire (crimped the ends on, clipped them to the speakers) and then I got the speakers, jiggled them into their spots, and screwed them down.
Next, I have to cut out a section of the plastic interior trim, and put some kind of cover on it.