Split Screen 3840 x 1080 (two displays)

[mcfc4heatons]

I have succesfully got Sega Rally Revo on my PC on three displays working with the help of Widescreen Fixer to fix the stretched picture issue. It looks pretty darn good. So we had an idea to play split screen offline with one display for each player. I chnaged surround settings to two monitors 3840 x 1080 but can;t seem to fix the stretching issue. Widescreen Fixer doesn;t seem to fix the issue. Anyone any ideas?

Thanks