@ Kyle2k
I wasnt actually saying I knew how to do this, I was just wondering if it would be possible? Some Magazine discs give you Demos to several games and when you first insert these discs a HTML (web page on disc) opens with a list of demos, you just click on the link to install the demo, so basically the link is linked to the setup.exe (or install.exe whatever it not important).
@ TheOne
Yes all valid points you have made here. If I were to even try this I would only try it with single disc games as yes multiple Cd's from the same game would actually make it harder, like you have said. I was just thinking out aloud.

Some games with multiple cds would work but definately not all. For example it would be nice to say put all the Battlefield games (1942, Road to Rome, Secret Weapon) on the one DVD. but this wouldnt be possible to do as easy as BF Vietnam. And as BF Vietnam is already 3 CD's to 1 DVD you wouldnt try to add it with all the others.

Thanks very much for you input it helps to keep us all thinking.