KDE Virtual Desktops

[dyn]

Does anyone know how to alter the number of virtual desktops without using a GUI? Surely there is a configuration file somewhere where this can be changed, but I can't find it. I thought it would be in ~/.kde/share/config, and I did find the file minipager_panelapplet_5d7ynahzk0wbe8mzuu3n_rc. However, the contents are just:

[General]
LabelType=LabelNone

This looks like the file that should contain the settings, but it doesn't. I've heard this file is actually generated with each new session, but I haven't checked. Also, in kwinrc I found a section like this:

[Desktops]
Name_1=Desktop
Name_2=Names
Name_3=Go
Name_4=Here
Number=4

But this data seems to be updated only when kwin is re-executed. For instance, if I used the KDE Kicker "Mini Pager" applet and lowered my virtual desktops to 2 and then run kwin --replace that section becomes:

[Desktops]
Name_1=Desktop
Name_2=Names
Name_3=
Name_4=
Number=2

So, this section also seems to be irrelevant to what I am trying to accomplish... Does anyone know how to do this without using the Mini Pager applet's graphical interface?

Edit:
I don't think this would affect the location of this file, but I'm using Kubuntu (KDE Ubuntu). Any help is appreciated even if it's not Kubuntu-related.