Crack problems help please:(

[carnosaur]

I dont know if this is a common problem.. I couldn't find the awnser.
Also i'm not great at all this tech stuff so its proberly simple.

I have got the metal gear solid integral (computer version of no 1) and the vr missions cracks.

I thought the purpose of cracks was so you don't need to use the cd. vr missions work fine but the main game says I need a cd (says please insert disk 1/disk2 when I try to do anything, but it does go to the menu).

I got one of my brothers freinds to help me, and he has no idea either.

Is this simple to fix?
what information will you need?

cheers, carno