Boot Floppy for Knoppix on old Dell System

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Hi,

I am looking for a boot loader, which will run from floppy disk and allow me
to boot into Knoppix from a CD, even though the BIOS wont support CD-ROM
booting (Old Dell OptiPlex GXi).

I have tried Smart BootManager (http://btmgr.webframe.org/), but I get the
error "0xAA".

Can anyone suggest suitable alternatives?



TIA,

Mike