guys i have come across a cd which has a feature i never came across before.... not even heard of it. Its the jeppeson cd which our org is using and the unique thing about it is only one time installation. well i heard of all kind of copy protections and restrictions imposed by the software devlopers on the cd to avoid making the copies of it but this kind of protection is something which i never thought before.(am i the only dumb left or there are others in my leage too) anyway can someone throw light on it how it is achieved and is it possible for us to make a similar kind of cd. my biggest doubt still remains that how does the optical disk know that i have been used for installation once and my life is over.The cd when opened thereafter, kind of hangs but the contents are accessible after few attempts. But the installer cannot be opened.