It is time for knoppix to support lvm2. It is crucial for many systems and the lack of lvm2 support is a glaring hole in rescue disk functionality of knoppix. It would be trivial to implement. Currently dev-mapper is active in kernel 2.6, and the same can be done for 2.4. Currently, /dev/mapper is a link to the live-cd, it should be copied over to /dev instead of linked as lvm needs to write to that directory (when 'vgchange -ay'). The only thing left is to install lvm2 which takes up little space as it is a small file.