The only way to prevent the user being able to copy the files is to silently install a rootkit from autorun - assuming the user has autorun enabled... and this is a BIG NO NO remember you are a GUEST on the end users PC and respect them at all times (nothing personal I have a pet hatred of programs that do things to MY system without my permission even if its just to put something into the startup or add a process)
At the end of the day all you will ever be able to do is prevent casual copying - and at a great expense in time and effort for you and at the expense of convenience to the end user... even the best commercial copy protection has been cracked in 4 days from release...
At the end of the day all you will ever be able to do is prevent casual copying - and at a great expense in time and effort for you and at the expense of convenience to the end user... even the best commercial copy protection has been cracked in 4 days from release...