i am running Kubuntu 10.10 on my WeTab Tablet PC. As this Tablet has no mouse (but a touchscreen), I would like to configure Kubuntu in a way that allows to perform a right-click.
In Ubuntu (not Kubuntu), there is an option to just hold the left-click for about 3 seconds in order to perform a right-click (Mouse => Accessibility => "Trigger secondary click by holding down the primary button").
I can't find something similar in Kubuntu...
Have you checked under System Settings > Input Devices > Touchpad (Tapping tab)?
I don't have a table PC but my laptop has a touchpad that gives options to make parts of the pad behave as a button.
Currently it looks like this is only available for a Unity/Gtk/Gnome based desktop.
If you can find any solution, you may use "Menu Key" in a onscreen keyboard like "Kvkbd" or "Onboard".