Suse 8.1 DVD to hard disk

Hello, I have installed SuSE 8.1 from the DVD. Now I want to copy the entire DVD into a partition of the hard disk. The problem is that I have copied al the contents of the DVD of SuSE 8.1 to the hard disk, but when I want to change the installation source in YaST2, and point to this partition, it doesn't work. Some idea ? Thanks!