mmmmmmmmmm - food for thought here, i has this problem but for me it was the other way round.
Put the one stick of gskill back in the orange slot closest to the CPU - when the computer starts go into the BIOS.
Change RAM voltage to 2.8v, LDT voltage to 1.3v and LDT multiplier to x4.
If you go into ram settings from the top set at 200mhz - enable - 2 - 2 - 6 -2 then put all the other settings on auto, save and restart.
The objective is to enable you to flash the BIOS to the latest version (Beta 0712), but to do that we need to be able to get you into windows with some sort of stability.... hopefully this will work for you - if it does not then you may need to make a purchase at PCWorld for 256mb of PC3200 ram (nothing fancy just the cheap stuff).
Mav