[DoctorDyna]

make your guisettings.xml readonly once you have the wanted setup.

Ahh! I was hoping this wasn't the answer, I like to tinker with it sometimes.

This might work, but I'm not entirely sure. It should have the same effect as what Memphiz suggested above, but would only lock the screen selection:

place this an an advancedsettings.xml (wiki) file in the userdata (wiki) folder:

Code:

<advancedsettings>
    <videoscreen>
        <screen>1</screen>
    </videoscreen>
</advancedsettings>

and I think:
0 = first screen
1 = second screen
2 = third screen
etc

This works! I think a little while ago I went digging around through the wiki to see if this setting existed and couldn't find it. Thanks very much for pointing it out.

Now, let's see what else I can mess with in advancedsettings *grubs hands*