It's probably not accurate to believe the San Francisco 49ers are going all in with Chris Cook and the one-high safety scheme.After all, Cook signed a one-year deal worth the veteran minimum with no guaranteed money. If he was going to be the centerpiece of a new scheme, he'd get paid like it.However, the addition of Cook is a sign the 49ers would like to do more press coverage and work in some one-high safety coverage, which Seattle Seahawks have executed so well.