An interesting discussion!
And yes - I see your frustrations Marcus...
In v2.0, the presentation screen is actually fixed to appear on the right half of the extended desktop (assuming you have dual monitors and no more).
To be specific the presentation will appear at an [X, Y] coordinate on the desktop which is equivalent to:
X = Resolution width of Monitor 1 + X coordinate of Monitor 1
Y = 0
For example, if your operator screen (Monitor 1) is 1024x768 and your projection screen (Monitor 2) is 800x600 then the desktop is expected to be configured like this - I hope this is readable:
++++++++++++++ ==========
++++++++++++++ ==========
++++++++++++++ ====
2 ====
++++++
1 ++++++ ==========
++++++++++++++ ==========
++++++++++++++
++++++++++++++
So the presentation screen will display at coordinate [1024, 0] on the desktop. Voila!
As you can see, if in reality the logical position of the monitors is horizontally reversed then the presentation screen would appear at coordinate [1824, 0] which actually is somewhere in mid-air because it doesn't exist!
Unfortunately there is no workaround for this at the moment, but we will address it in v3.0 as Diceman suggested
Christian