Change Matrox G200ew resolution settings via RDP

I have a Dell server that is running Windows Server 2003 that is not physically located near me.  I can access the computer via RDP without any issue.  However, I can not access the server via my IP KVM, which is used as a back-up.  At this point in troubleshooting, I am pretty sure that the default resolution of the G200ew is too high for the KVM.  I want to change it to something like 800x600.  

Of course, when using RDP, I am using a virtual video driver, and do not have access to the settings of the physical video card.  I have been looking at the registry settings, but I can't make sense of them. i.e they don't have obvious binary values that translate to video resolutions.     

How can I adjust the default video settings of the G200ew via RDP?  Or, at least see what the default resolution is?