Sharing a flimsy, cardboard box with another soldier is sure to cause an inexhaustible supply of awkward discomfort. Aside from the clear violation of personal space, there are two major concerns for the occupants of Metal Gear Solid's iconic camouflage: (1) Who's driving this thing? And (2) that better be your gun poking me in the back, I swear.Thankfully, Metal Gear Solid: Peace Walker has an elegant solution for the former problem. Holding up on the PSP's d-pad will "sync" you with your sneaking partner(s) and, as long as the button remains held down, you'll stay in automatic lockstep with the leader. Remaining a cohesive group is an essential strategy for a silent approach, though splitting up offers its own advantages as well.