Hi Matt,
If they just pupated be sure not to handle them until their skin is hardened. Go to the article and look at the changes that take place - you do not want to handle until the look like the 2nd pic.
Do you want them emerging within a month or so? Then all you need to do is to place them in a container with some paper towels (they will think they are underground) in a safe place (away from cats, kids, chameleons
) expose them to regualr daylight and temps - where do you live? BE SURE to provide a stick for them to climb up on and expand their wings.
If you are going to mate them you obviously need a male and female. You can tell by the pupal case.

Hope this helped 
lele
hornworm thread
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