I don't think "work for hire" is really that important to the overall question. Probably the best thing to do would be to ask if you can release it, or maybe e

I don't think "work for hire" is really that important to the overall question. Probably the best thing to do would be to ask if you can release it, or maybe even just parts of it if they want to keep some stuff in house. Even if you are legally allowed to release it without their permission, asking permission and respecting their wishes would be a courteous thing to do... but they might just say yeah go ahead and release it and then you have nothing to worry about.