Here is what has worked best for me.

First pull the engine and set aside on clean rags. You will have to unhook some stuff but some things will stretch enough.
Second I have one of my smaller buddies get in the engine cavity and I close and latch the hood. Now your buddy can loosen the hinge bolts a bit to allow everything to kinda relax and line up so there is no side pressure or anything on the latch. Then ya just tighten the bolts back up and it should open just fine. Now if it won't open, you can pass another beer to your buddy inside to keep him appeased while you and your brain trust of "other buddies" hatch the new plan. Just keep at it and when shes perfect just throw the engine back in her and your off!