Hmmm how would I do this......aha!
Get putty on your winbox. It's an ssh client. ssh into your Knoppix box. Of course you'l need to log in as someone who has write permissions for /var/www and use scp OR you could even boot Knoppix on the winbox, mount the drive that contains the files you want to transfer and still use scp through mc (midnight commander). Piece of cake.

You could just copy them to any directory on the Linux box and mv them to /var/www as well.