You don't have to but it's easier. I also have a 1.0 x-box, but all I did was put a little extra solder on the top of each hole, put the pin header on, and solder the extra on to the pins individually. I know I keep saying this but I still think it's the easiest setup for 1.0 x-box.
If you don't want to touch the LPC go for the wire setup. You don't need to desolder the LPC, but you are gonna want to solder something.