I wrote up a detailed blog post on how to run knoppix simultaneously with Debian or for that matter any distro of Linux without using any virtualization software.
Also instead of cloop i used squashfs.
AMD N80L286-16/S Vintage 286 CPU in Nice PLCC Package x86 ~ US STOCK
$10.50
Casio PB-700 Personal Computer Vintage *Parts Or Repair*
$45.00
Vintage Compaq 141649-004 2 Button PS/2 Gray Mouse M-S34 - FAST SHIPPING - NEW
$8.99
(4) Motorola MC68681P Dual UART ICs, Vintage Good Used ~ US STOCK
$7.50
Vintage IBM Personal Computer AT 5170 Complete with All Drives no Power as is
$250.00
Lot Of 5 Vintage IDE Hard Drives, Conner Seagate, Quantum, Maxtor *Non Working*
$27.99
IBM Lexmark 1995 Model M2 Vintage Keyboard Part No. 73G4616 PS2 connection New
$55.00
Vintage Intel Universal Prom Programmer UPP-101
$1999.00
Vintage Face Plate Switch Console Control Board Front Panel 105315-01 AED-8000
$1999.99