I'm not too familiar with the White Label version of the game, does it actually require you to install anything? Or can you just run it straight from CD? (i'd assume the latter, but like I said, I'm not too familiar with the white lable version)
Okay, forget that, I looked it up, all it really needs to do is sound configuration, which I guess you've already done (if not, look at the referance in the manual). meaning that technically, there was no reason for you to copy the files, but if it's conveinient for you, there's no stopping you fron copying the files. All I can say is that if you do that, make sure you copy everything. if it's anything like my version of MI1 and 2, then the two games should be in indivisual folders on the disk which should be easily identifiable and I suggest you just copy the entire folder (note, the music on mi1 won't work without the cd in the drive).
But for now, and for your immediate problem, just try running it completely from your CD. If that doesn't work, try scummVM (linked in the above post by James Issac) and while your at it download scummvm q+e (just a frontend) from here
and install it into the same folder as scummvm and then run that run the game through that.
Hope this helps.