First download the latest HLSL files and overwrite your existing ones (from your MAMEUI etc download).
Download is here ->
http://www.users.qwest.net/~amerrill/hlsl.zip
Then edit your MAME.INI with something like this (Someone else posted "Here's an ideal Arcade monitor setting you can use"):
hlsl_enable 1
hlslpath hlsl
shadow_mask_alpha 0.1
shadow_mask_texture aperture.png
shadow_mask_x_count 512
shadow_mask_y_count 384
shadow_mask_usize 0.1875
shadow_mask_vsize 0.1875
oversample_x 1.0
oversample_y 1.0
curvature 0.05
screen_scale_top 1.0
screen_scale_bottom 1.0
pincushion 0.05
scanline_alpha 0.5
scanline_size 1.0
scanline_bright_scale 1.0
scanline_bright_offset 0.7
scanline_jitter 0.0
defocus_x 1.0
defocus_y 1.0
red_converge_x 0.0
red_converge_y 0.0
green_converge_x 0.0
green_converge_y 0.0
blue_converge_x 0.0
blue_converge_y 0.0
red_radial_converge_x 0.0
red_radial_converge_y 0.0
green_radial_converge_x 0.0
green_radial_converge_y 0.0
blue_radial_converge_x 0.0
blue_radial_converge_y 0.0
red_from_r 1.0
red_from_g 0.0
red_from_b 0.0
green_from_r 0.0
green_from_g 1.0
green_from_b 0.0
blue_from_r 0.0
blue_from_g 0.0
blue_from_b 1.0
saturation 1.0
red_offset 0.0
green_offset 0.0
blue_offset 0.0
red_scale 1.1
green_scale 1.1
blue_scale 1.1
red_power 2.2
green_power 2.2
blue_power 2.2
red_floor 0.05
green_floor 0.05
blue_floor 0.05
red_phosphor_life 0.45
green_phosphor_life 0.45
blue_phosphor_life 0.45
yiq_enable 0
yiq_w 4.1187867
yiq_a 0.5
yiq_b 0.5
yiq_fsc 1.5
yiq_fsc_scale 2.0
yiq_phase_count 2
It makes me lol, cause if any of my monitors looked like this I would smash em up!!!! It looks terrible imo.
Anyway have a play mate and let us know how you get on.... personally I would rather fire up one of my cabs! roflol