[zoran]

Perfect!
At the moment I'm not able to download file. So, I will ask
few more questions, before doing tutorial or whatever.
Is there something in original email? Instructions?
How big this file is?
There are two possibilities: first is that SD card image was
dd-ed and piped to output file using tar:
dd if=/dev/sdX | tar -czvf -
It should be unzipped, untarred and piped to the card.
Second, only files and directories on the card were tarred.
Then, file system ext3 has to be made and file unzipped
and untarred directly to it.
Side notice is that I use freebsd and has to read manual for
differences of tar versions, regarding linux. When I have
more time and more data, we will go through together and
show how easy this should be.
Technically, file system should be made first with:
mkfs.ext3 -L Kobo /dev/sdX
Then, in second option, on linux:
tar -C /dev/sdX -pjxvf filename.tgz
Linux version might differ a bit, I have to admit. I used this
command on linux, but it was my device and my right to
brick it, and the container was bzipped2. So, I used flag
j instead of z.
Best regards

Zoran