While snooping around the stock init script, I spotted a variable, home, in the mountdata function standing out from the crowd. After doing some quick tests, the preliminary results are summarised as follows,
Prerequisite: The persistent overlay (.img, .aes or .inf) being on the same partition as the KNOPPIX file.
Functionality: Loading a specific persistent overlay at the boot time.
Usage: knoppix home=/mnt-system/foobar/dummy
*The dirname and basename cannot contain any whitespace characters.
*The basename needs to be unique if there are more than one overlay files in the same folder because the suffix cannot be part of the argument.
Altair 8800 CPU Board Working *TESTED* reproduction
$790.00
MITS ALTAIR 8800 Vintage Computer w/ Keyboard, Floppy, boards - Buy It Now
$9275.00
MITS ALTAIR 8800 B Original Vintage Microcomputer
$5250.00
S-100 backplane motherboard bare PCB 9 slot (for Altair/IMSAI)
$30.00
CROMEMCO 64KZ, 64K Memory board S-100 board 1978 used for Imsai, or Altair
$185.00
MITS ALTAIR 8800 Original Vintage Microcomputer with 14 boards - Buy It Now
$8900.00
MITS ALTAIR 8800 Original Vintage Microcomputer
$6000.00
Altair MITS 8800 CPU Parts Kit not IMSAI 8080 S100 (board NOT included)
$69.95
VINTAGE DEC 1975 VOL 1 ISSUE 1 SCCS INTERFACE MAGAZINE MITS ALTAIR COVER & ADS
$358.99
Wenger laptop backpack, Altair, 15.6 inch, tablet compartment, Black
$145.19