Here's how you get higher detail/resolution terrain....
in cgold.pff you edit the following lines
|b|D!9€|D>0€|g|D>1€ |wTerrain Detail ~|D+2
|b|E!9€|g|E>0€|E>1€ |wTerrain Resolution ~|E+2
to
|b|D!9€|D>0€|g|D>1€ |wTerrain Detail ~|D+5
|b|E!9€|g|E>0€|E>1€ |wTerrain Resolution ~|E+5
basically the numbers after the + sign at the end denote the number of levels for each option. I think you can enter anything up to 9 but 5 seems to work well for me.
Restart comanche gold and go in to the settings menus. You'll notice the number of boxes hasn't changed, however the number of time you can click before they reset to zero has

Basically even when the option has been maxed out on the menu you can continue selecting it to get higher detail. For best effect start a mission and do it from there so you can see the results on screen.
