ok well i'd be interested to see this as i chose to mount my PC in the spare wheel well of my 02 RSX... as far as strengthening up the glove box you could try fiberglass, it should work well, just take your time and you could easily strengthen it and even add extra material to cover where it sags....
and about covering the 2nd DIN slot.. look at getting the drawer door frmo a Base model. taht could be the easiest solution since it'll be a door you can open and close for access to the dvd drive..
post your pics up..
i have some on my filebox..