Possible GPL violation by Kyocera Multi-Functional Printer KM-1820

[nurweiterso at gmx.de]

Hi all, 

someone gave me a copy of the firmware that is distributed by Kyocera to their technicians and (I guess) is installed on every MFP. 
The ZIP includes a initrd.bin, ppcboot.bin, rootdiskimage.cramfs, setupdiskimage.cramfs and zImage.kmmfp.

The device seems to include a PowerPC. The zImage.kmmfp seems to be a standard linux kernel for PPC, at least the file includes text like:
Uncompressing Linux
Now booting the kernel
bad gzipped data

I wasn't able to uncompress the kernel image zImage.kmmfp yet. BTW: Can someone please propose a how-to?

When I mount the *.cramfs I found several GPL'ed software:
+ busybox
+ libncurses
+ libcrypt
+ appletalk/ipddp.o
+ pam_unix
+ dhclient
+ libext2fs
+ samba
+ cups
+ cron

The file motd includes:
Welcome to MontaVista Linux 3.0, Professional Edition

so I guess this firmware is based on this distro. 

What's about the GPL?
I don't believe they wrote the Linux kernel and the other software from scratch.

What should I do next?

Kind regards


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