|Wow. That's what I call winging it!|
How about doing it the normal way of insert the disk, go to My Computer and double click on the drive you put the disk into to autostart the game install?
What game are we talking here?
Clearly d: is NOT the correct drive. Next time before you issue commands identify the correct drive or simply go d: and hit enter. If it says not found you know you have the wrong drive letter.
I would suspect you were taking the instructions literally when it mentiond d: drive. I am sure it mentions whatever drive letter your cdrom/device is set to