i manage to solve this.

i logged in with a guest session and launched for example Skype - then switched user to my regular account. In the terminal i used sudo nautilus and then i went into /tmp/guest-xxxxx/ folder. There i found a .Skype folder - i copied it and pasted it in the folder /etc/skel . Worked great!

However i also want to set the guest-session to automatic log out if system is idle for X minutes. How can i do that?