Wildcat Dilemma

So let's say you are like Philadelphia and Miami, with 2 traditional QBs and 1 wildcat type QB. (Philadelphia - McNabb, Kolb, Vick; Miami - Pennington, Henne, Pat White)

You have a dilemma on your hands. What order do you list the QBs on the depth chart?

1. Traditional QB
2. Traditional QB2
3. Wildcat QB

If you do this, you can't use your Wildcat QB until the 4th quarter. Why? The NFL has a rule that says if you use your #3 QB before the 4th quarter, the #1 and #2 QBs on the depth chart can't play until the 4th quarter.

1. Traditional QB
2. Wildcat QB
3. Traditional QB2

If you do this and if your #1 QB gets hurt, then you HAVE to use your Wildcat QB (who is probably not better as a QB than your second best traditional QB) for the rest of the game until the 4th quarter.

So what do you do? The answer seems so simple to me:
List your wildcat QB as a wide receiver or running back. Then they can come and go as they please.

I thought maybe a player listed in the QB depth chart has to be on the field at all times for offensive plays, but that's not the case. Miami runs packages all the time without Pennington on the field.

Easy. Right?