I used this aswell with a friend.I got a tip from here: http://www.triumphrat.net/street-triple-forum/155941-crm-low-boy-install.html
It says to remove the top 2 bolts holding the subframe to the frame, and then you can tilt the subframe forward and pull the midpipe out. It takes a little work, but may be easier than removing the entire battery tray.
Scott