Many thanks, MOE-inx,
THERE, they assume that I'm an expert in Linux, but unfortunately I'm not.

It is just not clear enough for my level of knowledge what I have to do.
I downloaded four files with extension *.tbz2 and *.tar.gz from the sources given in that documentation.
I could extract the files with command 'tar -zxvf <filename>.tar.gz', right?
But what do I have to do with *.tbz2-files?
After that, I can install with './conigure', 'make clean', 'make', and finally 'su -c 'make install'', right?
Now, do I have to install all of the files?
Files downloaded:
opensource_ubranch_20050302.tbz2
unichrome-X-r30.tar.gz
via-20060403-linux.i386.tar.bz2
xf86-video-via-0.2.2.tar.bz2 (I found this file
HERE and got it from
HERE)
I really appreciate, if you could help with this....
EDIT: Sunday, June 8
Please, can somebody tell me if I can harm my VL installation by doing
the above mentioned installations 