[Captain Kwok]

Fields that can use formulas are labeled "Blah blah Formula".

This line details the "range blocks":
Weapon Space At Range Distance Increment := 10.0

If you were to change this to 1.0 and had a weapon go to 9 range, it would likely fill up the first row of range boxes (which would still read 10...90 since they are just a .bmp image).

There's a couple of ways to modify accuracy.

This line can change the rate that accuracy changes at range.
Weapon Space To Hit Modifier Formula := 0 - ([%Range%] * 0.5)

The above example would have accuracy decrease at half the range. That is at 50 range, it would have -25% penalty.

Alternatively you can change this value:
Weapon Space To Hit Modifier Formula := 25.0

Which adds a blanket 25% to hit at all valid ranges.