Updated 7/9/2002 -- MANY great and annotated photos below in this thread detailing factory bracket modifications for custom flush mounting in-dash head unit and in-dash dvd player.
LONG POST --- but might be helpful to those considering mounting your own head unit. FLUSH mount pic you want to see is in the third post below.
Finally got my head unit and in-dash dvd player installed over the Independence holiday. See pic below and a couple of other pics in the next two posts. I'm not sure how to put two or more pics in same post so if someone knows how, please fill me in.
The install is only at 98% as I still have to fashion the textured abs plastic trim around the top/sides of the Alpine head unit and make the final +12V connection rather than my temporary connection over at the passenger fuse box.
My main pride and joy was being able to mount the head unit further back (about 1/2" and at an angle such that the face of the head unit is flush with the surrounding dash and dvd player and in the same plane. The Alpine units of today are slanted and like most other radios would stick out a good 1/2" or more if mounted per the instructions (i.e. the easy way).
Install comments on the Honda in general: I don't trust using the sleeves when they are only mounted to some flimsy plastic which is clipped into the dash. I prefer using the factory brackets. However, a lot of time was spent modifying the factory brackets to accomodate 1) the Alpine head unit and dvd player and 2) to move the head unit back and at an angle.
BRACKET MODS -- None of the holes in the head unit or dvd player matched up to the factory bracket so here is what I had to do: Each bracket recieved the following modifications: 1) drill two holes to mount head unit, 2) drill one hole to mount dvd player, 3) slot the two existing holes used to mount to dash which enabled me to raise the brackets within the dash, 4) file down the little bump outs to about half thickness (see head unit mods below), and 5) file the upper corner of each bracket to allow each to be raised within the dash without cutting the upper dash plastic.
HEADUNIT MODS -- Since no holes in head unit lined up to factory brackets you have to either put additional holes or slot existing holes in the factory brackets (see above). The only modification to the Alpine head unit I made was to drill a small indention into each side so the little bump out on each factory bracket would stick into my new made indention to help prevent rotation of the head unit. This allows you to not rely totally on the two screws per side that hold the bracket to the head unit for rotation prevention. It is hard to picture but once you see how the factory brackets attach to the factory head unit you will see what I mean.
DVD PLAYER MODS -- No modications to the dvd player were needed other than using a longer screw (10x32 x 3/4") on each side to reach the threads on the side of the player. You may have noted I only used one screw per side to hold the DVD player to the brackets. I used a strap in the back to tie the rear of the two head units together. So basically, the dvd player is attached at three points, which is secure.
DASH MODS -- The Audiovox/Flexvision dvd player is a full size DIN unit which means you will have to trim the inside dash a little if you want it to fit flush or slightly behind the center dash panel. I used a coping saw to trim about 1/8" off the inside dash trim on the two sides and the bottom so the face of the DVD player could be recessed into the dash further to provide the flush look. There is enough trim left after cutting so the two clips on the bottom of the center dash panel still have something to grab hold of.
These mods took me the better part of two days but I feel it was worth it to obtain the flush look. I don't know if a local shop would have done the flush install of both the head unit and dvd player without going to an hourly rate of $30 by lots of hours.