Hi, I have maybe stupid question, but how can I unpack *.tar.bz2 files? I didnt find any unpacker (untar, bzip2, untgz, ... nothing didnt unpack it).

You need to first use bzip2 and then untar :)

<but how can I unpack *.tar.bz2 files?>
tar.gz : tar zxvf this_is_a.tar.gz
tar.bz2 : tar yxvf this_is_a.tar.bz2 or tar jxvf this_is_a.tar.bz2

You can safely omit the v, it's only there to show the files scrolling over your screen while the archive is untarred. To handle .bz2 archives, you must have bzip2 installed. However, on a regular Linux or BSD-box, it is installed by default nowadays.
regs
hgm
lots of examples ....;-)

OK, I have bzip2 installed, I will try it. Thank you very much :o)

And one thing in addition: My question was written in 9:51 and solved in 10 minutes. COOL!

@lowietje1
The version of tar included in the MOS SDK doesn't have support for bzip2 (the j option), but you can get around that using pipes.

Example:
bzip2 -d -c archive.tar.bz2 | tar -xv

<(the j option)>
Thx , I just cut and paste a linux-question from the 'net'
My intention was not to be 'that' accurate , but just give a lead. Nevertheless thx anyway Golem:-)
regs
hgm

You can do it like this:

tar --use-compress-program=bzip2 -xf file.tar.bz2