Well, possibly if you know how to code game installers, but why would you need to? Is including the modified exe on the disc in a different folder too difficult?
I've seen skullptura rips that unpacks all of the installer files along with the crack, all that is needed is for the user to run a setup.bat file. How does he accomplish this?
Simply put, he's a genius Ok, so he's not, but i wouldn't know where to start... But Sam's right; if you're going to pirate something, don't be nit-picking about how you install the thing