DSL Embedded :: Load filesystem in a read-write mode

The write cheatcode will setup the massive sym links to allow most of the filesystem to be writeable on ramdisk.
The write boot option is calling the mkwriteable script. The same script is called whenever a .dsl type extension is loaded.

We also offer the frugal boot code which among other things remounts the read-only mount point of the cdrom to be writeable. This allows for extensions to be copied as root to /cdrom for later automatic boot time loading.

I'm really sorry but I didn't understand well.
How can I do that?

I tried with this:

START qemu\qemu.exe -L qemu/ -enable-audio -localtime -kernel linux24 -initrd minirt24.gz -hda KNOPPIX/knoppix -hdb qemu/harddisk -append "qemu sb=0x220,5,1,1 frugal quiet modules=hdb dsl write"

but I guess it doesn't work...

Is it right?

original here.