THIS is why I love this community everyone is willing to help if not get an answer for you.
I got a friend who knows about this and took like 2 hr-ish. He did it with a jack and some stands. Took the engine mount off and used the jack/stands to support the engine. The sounds is amazing...I do not even use my radio anymore, lol.
I did find an install PDF for the N55 for a Vishnu D-pipe, same concept with every other DP. It says step by step how to do it, but it if freaking impossible to do it this way.
Hope this help, took me some time to find.