Hello all, hopefully I'll get a Reply soon, but I just Bought the Pioneer AVH-P5200BT, with Optional Remote and AVIC-U220 and although I haven't gone about Installing anything yet, because I'm having A LOT of Issues with taking my 4-Seat-er Turbo Convertible apart, lol, I did already Buy the Nice Looking Brake Bypass Harness from ebay, because I didn't know about the Navigation Unit Cancelling that all out till now, but here's the thing, if I Buy the PAC TR7, will I still be able to use the Relay Bypass Harness I got off ebay to Wire it all up like in the Diagram, or did I Waste my Money on the ebay Bypass, again, keeping in mind, it wasn't until I saw Comments on YouTube about the Brake Bypass not Working with the Navi, so?? Honestly, it's starting to Sound like it would be A LOT Easier and A LOT less Hassle to just Connect the Parking Brake up, but with my Car, the Parking Brake Wire is IMPOSSIBLE to get to, so I thought this would be easier; however, I guess not?? 
I put my Car in A LOT of Auto Shows as well, so I thought this would be Cool and all, then again, during the Shows, my Car will be Parked, so I dunno if it's Worth Spending the extra $20.00 on the PAC TR7 if I can't Wire it up with the Brake Bypass I already have from ebay, so I dunno, but any help from those who Wired this all up would be WONDERFUL, Thanks!!!!!!!!!!!! 
James C.