Instead of pasting the whole crt_range provided in mame.ini, just pick the three horizontal values from it (h front porch, h sync pulse, h back porch) and replace them in the crt_range0 line from the arcade_15 preset. To save you time, here you have the preset and the values you have to replace:
crt_range0 15625-16200, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 192, 288, 448, 576