Am I allowed under most Enhanced License Agreements to print and resell manipulated photos (by various photographers) @ 36"x48"?

This is not a on demand situation, as there will be a limit 10-20 prints of my Photoshop CS5 manipulated images on Gatorfoam with text on the image. In the future my offerings may include mugs and mouse pads.

Essentially the photo is just the starting point for my manipulations, this also may include montages.

I don't want to exploit any artist / photographer under any circumstances - please advise.