The Linux Kit is designed exclusively for the Japanese model of "PS2", SCPH-10000,SCPH-15000 and SCPH-18000. Since these models are for domestic use in Japan, the Linux Kit is only available in Japan.
At this point, there is no plan to release the Linux Kit for non-Japanese model of "PS2".
PS2 Linux Kit is only available in Japan
Try gentoo [gentoo.org]. It is small, and newbs can figure it out (if they bother reading the guides)
:)
The documentation is worth reading even if you don't plan on installing.. they've got a different, laidback approach