I went out and looked at ours. Really couldn't find much to suggest. I take it the hood won't come off the fully closed part of the latch. Bouncing down on the hood, or bouncing down and tugging up, WHILE the inside handle is pulled, might get it to release.
The release cable runs from driver side, of course, just below the radiator support. It can be reached from the upper outer (driver side, near the headlight) opening in the grille. But then what? Person in front could tug on it while person inside tugs on the handle. You could reach in and cut it, then strip it down to pull on the core with vise grips, but my guess is the problem is in the latch mechanism not the cable. I could just touch the lower driver side corner of the latch, which is where the cable attaches with one screw. I do NOT think it'd be likely to catch the core, to the right (passenger side) of that screw with a hook made from a coat hanger or the like.
DID look like removing the wipers and air inlet grille to get at the hinges would work but the latch likely won't let go of the hood. Here's what I suggest:
1. Talk to a Service Manager or Assistant Manager at a Ford Dealer
2. Or perhaps a Locksmith who does vehicle lockouts - Or a Body Shop
3. Post the question on an auto forum like batauto.com since this problem is the same for all Ford Van types across a range of years
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB