Change channel on briefing TV (lingerie channel)
During the first interactive briefing segment when Snake and Otacon are talking to the Colonel on the big TV, maneuver MkII to the table near the screen. Extend his neck as high as it will go and you will see a black remote control on the table. Use his arm (R1) to hit the remote. Doing so will initiate a slide show of Asian models in lingerie. You can hit the remote again if you want to see good ole Roy again.