After paying
all my attention to
http://bugs.pardus.org.tr/show_bug.cgi?id=19066 it's now time to return to the normal (and less urgent) issues.
I have been

with the following result:
I have installed VirtualBox 4.1.2 r73507 in P2009 (thanks to pavi

) .
After this I downloaded and installed Oracle_VM_VirtualBox_Extension_Pack-4.1.2-73507.vbox-extpack.
Next I installed Pardus-2011.2-Cervus-elaphus-i686.iso as a Guest_OS in VB.
And now the most important conclusion is:
Don't install the VBOXADDITIONS_4.1.2_73507 in Pardus-2011.2 Guest_OS.Instead leave/use the default virtualbox-guest-utils from Pardus-2011.2 Guest_OS.
In this way I get a 100% mouse integration and screen resolution (currently 1440x1050 on my HP LP2475w)
And after making a permanent shared folder with the name "test" and adding
test /home/atolboo/share vboxsf defaults 0 0
to /etc/fstab (see
http://www.virtualbox.org/manual/ch04.html#sharedfolders).
The permanent shared folder is accessible in Dolphin in /home/atolboo/share after a re-start of Pardus-2011.2 Guest_OS