Explanation for the flasher code then;
You're loading the stock kernel image, which you can find easily on the internet, the booting it with a modified CMDLINE (kernel parameters), they're all the same actually, only init= is using the backed up preinit.

A way to get the zImage,
Download http://repository.maemo.org/pool/mae...+0m5_armel.deb
Unpack it, then unpack the .fiasco with flasher-3.5 -F .fiasco file -u

Or here: http://mohammadag.xceleo.org/public/...ls/zImage-pr13