Making games run without the Cd/DVD using a crack is a legal grey area........you have to do this to create a back-up copy of legitimately owned discs.The EULA on most games will say you are allowed to do this.
Breaking the copy protection on the disc......which is what you are doing when you use a no-cd crack is however illegal.
As such we are not allowed under forum rules to tell you how to do this.
A Google search will give you all the information you need.
Beware though.....many of the sites you will find are riddled with malware and trojans.If you start with a visit to megagames.com which is a game specialist site you might just find what you are looking for, without risking the more unsavoury sites.