Okay apologies to everyone, I realised that I made a slight error in where i could do the ratio conversion between vertical and horizontal FOV, now i updated my original post to be correct.
Pedro, your FOV should therefore be 81 degrees, not 97. This explains why you felt that 97 was so bad and that gpl's default of 78 felt much worse hahaha. So yer, try 81 and see what you think
Sky, yours doesn't change very much - 41.7 so either 41 or 42. Triple screen would be 97.62 (but without bezel compensation so it's kind of meaningless really unless you are using matrox triplehead to go as this does bezel compensation in a different way so it would be correct!).
But yes, i just reread your post - bloody hell don't run a 3 screen area FOV setting on 1 screen, that would look way distorted!!! For a start it won't be representitive of what you would see as your aspect ratio is different with 3 screens.
Others - i can't see your values in your posts so unless i am missing something then i am sorry.
If anyone needs any help, just ask. The formula in my original post has been updated to reflect ratio conversion.