He CAN boot an install disk at least.
The real question then becomes how to install dapper, in which case I might look at downloading one of the flights instead of the actual release. The entire problem seems to center around a single module in his kernel that needs to be patched and isnt in the release kernel. There are a couple of ways of addressing this, one is to install on a different computer if availiable and then transfer. Not reccomended but possible. Another is to avoid that install disk, as I said the earlier flights may be a possibility, otherwise use a different distro for the time being. Another is to roll your own Live CD which unfortuantly I cant help so much with as I have never done it myself