I cant find how to make a new post on knoppix forums
Select one of the Knoppix.net Forums; after this you'll see in the upper left corner the button "+ Post New Thread"
I cant work out how to make the drive persistent.
Have a look at Harddrive Installation. For the flash disk install of Knoppix DVD you need at least a 8GB USB stick.
And also test the install DVD with the Cheatcode "knoppix testcd" first.