For those who still interested - I've updated the linuxrc variant allowing compressed image to be appended to the boot image of KNOPPIX to work with KNOPPIX 3.8:

Patch for linuxrc: ftp://belyi.ac93.org/pub/KNOPPIX/lin...8-knxapp.patch
New minirt.gz: ftp://belyi.ac93.org/pub/KNOPPIX/minirt-3.8.gz

The procedure is the same as previously with just one difference - you need to update minirt.gz since there's no minirt26.gz in KNOPPIX 3.8

Cheers,
Igor