Laxity generic safedisc crack doesn't work with ISO's?



So far, I have been unable to get the laxity crack to work with any safedisc protected ISO. (that includes, System shock 2, C&C2:TS, and so on). Is there a reason why it doesn’t work? Is there another option besides (a) buying and copying the original CD with the instructions mentioned on this page for copying unreadable errors, or (b) waiting for a group to release a cracked patch update (For whatever title is in question?)

And I apologize if this has been asked before…