I was just looking at my car, hood open. If you made a bar, sturdy but thin enough to fit between the slats, you could come in from the passenger side, push the latch toward the driver's side, open. The bar would be maybe 12-20" long, have a slight angle midway, so that it angles out through the slats, but the part inside would be parallel to the radiator support. That is, directly crossways. Achieve whatever angle is needed to get hold, and get some leverage. Pressing down on the hood slightly to relieve pressure on the latch would help. The latch pivot, where you're aiming, is dead center behind the emblem, and screw underneath. So aim for that. If you hear you're hitting the weird two-leaf spring thingy, you're very warm!
I can post a pic if that will help.