Sega Viking: Battle for Asgard for Xbox 360 "reapers" Questions

how do you open the gate use a grim reaper pole and slice it or cheatcc.com

2 guitar multiplayer I have 2 wireless guitars (odessy & reaper) for GH3 for my PS2. I cannot get both guitars working in the multiplayer mode. Instead it keep showing a picture of 1 guitar and a ps2 ...