I have backed up a 3 disk game...
 

I have done so to protect my originals, yet it still asks me to insert cd such and such into drive D etc. If all the info is on my hard drive is there any way I can get around the disk swapping situation. I'm not to sure were this stands legally, but I would appreciate any help that is available.

PS the game is Planescape Torment

Visit GameCopyWorld, you will find what you are looking for, be sure to read the instructions properly. ;)

"Copy the full contents of CD#2, CD#3 & CD#4 to the <GameDir>\CD directory - overwriting existing files". Does this just mean copy the files into the root game folder??? Sorry but new to this.:)

Nope, not into the root game folder, rather into its subfolder called "CD".