I am looking for an experienced VeriFone developer that can modify a Vx 670 vx510. I have some files (source code, not sure here) w/e I can upload all my files so you can take a look and tell me. I am getting an error about some file not found, signature file? I want to get full working application that I can compile/modify and download to my vx510 vx670. I am not a programmer so I am looking for someone who can give me more information about this error, thanks.