Sigh...
As I said, it was asking for something I DIDN'T HAVE. ...
.
You didn't say that you didn't have the disk, unless there is some sort of invisible text in your message that I can't see!
Been runnin' Macs since 1985, with an interlude when they fell behind PC's during the 1990'. I run Windows 7 using Bootcamp regularly with zero problems, other than fighting the usual viruses and adware that come as part of the price of running Windows. I also run VMWare from time to time when I need to run the two os's simultaneously for a number of reasons - copying files back and forth (although you can easily do that as well when running bootcamp).
The way to run games is to run "native" using bootcamp. Anyone who tells you otherwise is pissing up a rope, or trying to make you go away. You are not accessing full use of resources like video card acceleration when using emulators.
People who have issues installing windows via bootcamp usually are trying to install a copy of windows that comes from a strange source- an OEM copy that is restricted to another computer model (ie Dell only), or some student/teacher issue deal that requires a university account, or a downright pirated disk.
Many times, the person installing it is an unaware victim of a well meaning friend.