CD-key to hex key convertor

Title says it all, i have found 1 program that can alledgedly change a cd-key to a hex key but i really dont trust the source so am reluctant to run it, i have searched on the forum but cant find anything that will change from 1 format to the other,

Is there such a program and if there is could someone point me in the right directin please

http://www.mpgh.net/forum/624-dayz-h...ml#post6376024
about the Only way i would know to convert to hex key,
then run Reg edit at the same time so you can just copy the data from that, Could take time for large scale operations, but Should only take like 30 seconds including typing in the key