Are you trying to install from the hardrive or the created DVD?
Unless it is a typing error by you the file should have the extension 'rtf' and not 'rt', so that may be your problem?
But it sounds to me you have a damaged file either because of a bad read to your hardrive or a bad burn to the DVD?
Double check the name of the 'license.rt' file.
P.S: If you ever Double post again, by mistake, it is possible for you to delete your own post or thread! The thread will need to be deleted before anyone else posts a comment in it tho!