how to make a knoppix DVD with a not compressed KNOPPIX file

Hi
I would like to make a DVD version of knoppix (3.6 would be great)

but I would like to use the 4.5 Gb available space to put an uncompressed KNOPPIX file instead of adding more apps

like this there would be no need for a huge ram drive and it will be much faster I guess

Is there an easy way to do this?

It could be the same thing than the hdd-installed version of knoppix since I will use it on only one computer, but it has to work read only (since it's on a DVD) I will do a fat32 partition for storiing my data and configs.

I remember reading in the past that the opinions were that it was better to use the compressed fs, rather then an uncompressed fs, simply because the read and access times are a far greater penalty then the compression times!