Changing color of grid lines system/combat view?

[Wildcat]

I have a very hard time distinguishing the color of the dark blue grid lines against the black starmap used in the system and combat maps, when the show grid options are on for system and combat views. I rely on the grid lines heavily for moving ships right where I want them and I want to make them MUCH brighter.

I tried altering the following files:

[SE4Dir]\Pictures\Backgrd.bmp (1.22 kb)
[SE4Dir]\Pictures\Dialogs\Rowgrid.bmp (1.28 mb)

As far as I can tell changing these *should* alter the color of the gridlines. However, even making the dark blue into something really bright (red, green, bright blue) doesn't seem to change the gridline colors in game. I've double-checked that I'm saving the files in the right place (made backups of originals), they have the right names/attributes/etc., but no matter how I change them the game doesn't even seem to use them.

I know I can just alter the brightness/contrast on my monitor, but I like those settings just the way they are for just about everything EXCEPT these silly dark grid lines. So, I want to change the grid line colors, not fiddle with the monitor settings. Am I not altering the right files? Do they need some sort of special attribute settings I'm somehow not saving properly?

Any help appreciated.