HEAR! HEAR!
I'm using knoppix v3.7, maybe this request has already been satisfied in later versions, in which case please ignore this.
v3.7 is using syslinux v2.04. Later versions of syslinux (and certainly the current version 3.09) have support for ext2/ext3
partitions - called extlinux - which makes it possible to easily transfer the /boot/isolinux directory onto an ext2 partition and
then run extlinux to install the bootloader on the partition. This would be much less hassle than the alternative of having
to translate isolinux.cfg into either lilo.conf or grub.conf syntax ;-(
HEAR! HEAR!
me thinks nobody heard us
Since 99.99% of us here are not Knoppix developers and are just community volunteers, you might want to suggest this to the Knoppix developers at their mailing list at http://sympa.linuxtag.net/wws

Dell EMC PowerEdge R740 8 Bay Server w/ 32GB RAM 2x GOLD 6132 2x 1600W PSU H730p
$499.88
Dell EMC PowerEdge R440 Xeon silver 4215 2.5GHz 16 GB ram 2x 550W PSU No HDD
$275.00
Dell Poweredge R630 2x Xeon E5-2680 v3 2.5ghz 24-Cores / 64gb / Raid / 2x 1Tb
$374.99
Dell Poweredge C4130 2x LGA2011-3 1U 4x GPU Rackmount Server CTO (NO CPU/NO RAM)
$299.95
Dell PowerEdge R730XD 28 Core Server 2X Xeon E5-2680 V4 H730 32GB RAM No HDD
$378.93
Dell PowerEdge C4130 1U AI GPU Server | 2x E5-2680 v3 | 32gb Ram | 2x 1600W
$409.99
Dell Poweredge R630 2x Xeon E5-2680 v3 2.5ghz 24-Core | HBA330 | No RAM or HDD
$149.99
Dell Poweredge R730xd 12LFF 2*2660v4 4*1Gbe h730 2x 750W Server CTO
$488.00
Dell Poweredge R620 10x 2.5" bay with 256GB (16x16gb) DDR3, 2x E5-2690v2, H710
$349.99
Dell EMC VxRail E560F 10-SFF 2*Gold 6230R 2.1GHz No RAM HBA330 iDrac Ent Server
$349.99