I just purchased a second Roku device and I need to retrieve the dev.zip or equivalent off of my main roku device, that way, I can install it on the the second one. Is this possible and how can I do that?
You mean your .zip package for your channel? You should have that on your computer... Have you had some sort of data loss so that the only copy is stored on the Roku? Either way, I don't think it's possible.