Kubuntu KDE4 file sharing

So, I have problem sharing the folders on my Kubuntu 9.04 desktop. So I do following to enable it:

1. apt-get install samba4, kdenetwork-filesharing
2. sudo chmod u+s /usr/lib/kde4/libexec/fileshareset
3. sudo rm -R /var/tmp/kdecache-root

Maybe not all of this is needed, but next time when I will have the same problem I'll try to figure how fix it correct.