I got a deck off crutchfield too, they sent me that pocket thing you're talking about even though I didn't need it.
Since I had an extra one I decided to try and have a little fun. I created a spot for my aftermarket switches - fog lights, neons, amp cut-off (in case a cop pulls up next to me at the light). It looks better in real life then in the pic, trust me. I included the attachment.