With JediMatt's help and suggestions I was able to get my Geneve working via HDMI with a SCART to HDMI converter. I paid about $40 US dollars for this.
Of course you need a 3v power adapter to put the converter into RGB mode.
The display is clear with no distortions.
So now I have a Geneve 9640 with the 384k mod, using the SCART to HDMI and to top it off using JediMatt's USB keys with the USBtoXT firmware.
Will post details later for wiring and such.