force rez on atv2?

is there any way to shut off the auto sensing on the atv2 such that all the possible resolution options are always displayed? I am working on running the hdmi out thru a switcher to my 1024x768 projector, and the switch only exposes valid HD resolutions at handshake with the atv. the very first time i plugged it in, the atv was able to output 1024x768 thru the switch, but since then it only shows the HD options when it is plugged into the switch.