What do you mean? Are you trying to put it on a floppy disk? If so, there's a little switch-like thing in one corner of the disk that switches between write-enable and write-protect. If you're trying to put it on the CD, well, you can't do that! You should just be trying to put it in the XWA directory on your hard drive. Or did I not understand the question?
"The obvious mathematical breakthrough would be development of an easy way to factor large prime numbers."
- Bill Gates