Reflection X multi screen problem

Am using Win XPpro with Reflection X. The system has 2 NVidia Quadro FX 3500s running a dual Planar stereo screen plus a "normal" flat screen monitor.

My problem is this - I recently had to swap my "normal" monitor from the right to the left. This was OK for Windows (I just repositioned the monitor number under desktop - properties - settings. However, when I start my X window it does not display properly due to Reflection X not allowing negative screen position numbers. I cannot seem to reassign the
monitor numbers in Windows so that I get the monitor on the left to read monitor 1. Can anyone help ?

Cheers