Again! Knoppix isn't a distribution, it's a Live Linux. Therefore KK has other considerations for Knoppix. The best option to boot a Live Linux medium also on elder computers is to use FAT32.
Please request Mr. Knopper to brainstorm with his team ..
You can ask KK yourself using the Knoppix Mailinglist but you have to convince him. In annother connection he wrote
Regards
-Klaus
PS: 0wn uses reiserfs as only option, because it is the only file system I know
which repairs itself in case of a prior sync-less poweroff by just mounting it,
and is fairly easy to handle compared to other tree+ file systems. You can try to
convince me to use something else in the furture, of course, if you know any
good reasons.
And the team of KK - there is no team apart from his wife, testing Adriane, the component of Knoppix for blind peoples.