a no-cd crack is only ok IF YOU owned the game
"No-CD cracks have legal uses, such as creating backups of legally owned software (a user right by law in many countries) or avoiding the inconvenience of placing a CD or DVD-ROM in the drive every time the software is being used, although this can be used likewise to circumvent software laws by allowing the execution of full versions of non-legally owned applications or time-limited trials of the applications without the original disc."aka not what OP is doing
pretty sure that's illegal