Thank you very much Gilles, it is now working thanks to your miniroot. The same machine also had a "traditional" PMI (KNOPPIX cloop copy, not directly from ISO), which I had to rename, though. Is there a way to avoid the scanning for KNOPPIX/KNOPPIX iimages under all detected filesystems which seems to take precedence over the "bootfrom" method? Also, I am curious, does the stock knoppix never work off NTFS, but only through your corrected minirt? That'd be a worthwhile addition to the standard release, it seems!