You can give these a try. Sorry I don't know what an MCR game is, I've been out of the gaming loop for a few years but this is the settings I have used for years. This is the work of a guy who spent 12 grueling hours staring at a real arcade CRT and tweaking to get as close as possible. Of course the type of LCD you have will make a difference. Hope it works for you, let me know what you think.
# DIRECT3D POST-PROCESSING OPTIONS
#
hlsl_enable 1
hlslpath hlsl
hlsl_prescale_x 6
hlsl_prescale_y 6
hlsl_preset -1
hlsl_write 1
hlsl_snap_width 2048
hlsl_snap_height 1536
shadow_mask_alpha 0.14
shadow_mask_texture SlotMask.png
shadow_mask_x_count 6
shadow_mask_y_count 4
shadow_mask_usize 0.1875
shadow_mask_vsize 0.1875
shadow_mask_uoffset 0.0
shadow_mask_voffset 0.0
curvature 0.10
round_corner 0.15
reflection 0.05
vignetting 0.24
scanline_alpha 0.58
scanline_size 1.05
scanline_height 0.75
scanline_bright_scale 1.30
scanline_bright_offset 0.55
scanline_jitter 0.05
defocus 1.00,0.50
converge_x 0.4,0.0,-0.3
converge_y 0.0,0.0,0.0
radial_converge_x 0.2,0.0,-0.2
radial_converge_y 0.0,0.0,0.0
red_ratio 0.90,0.05,0.05
grn_ratio 0.10,0.80,0.10
blu_ratio 0.10,0.0,0.90
saturation 1.10
offset -0.05,0.03,0.01
scale 0.96,1.0,1.0
power 1.35,1.25,1.10
floor 0.00,0.03,0.03
phosphor_life 0.40,0.35,0.30
#
# NTSC POST-PROCESSING OPTIONS
#
yiq_enable 0
yiq_cc 3.59754545
yiq_a 0.5
yiq_b 0.5
yiq_o 1.570796325
yiq_p 1.0
yiq_n 1.0
yiq_y 6.0
yiq_i 1.2
yiq_q 0.6
yiq_scan_time 52.6
yiq_phase_count 2
#
# VECTOR POST-PROCESSING OPTIONS
#
vector_length_scale 0.8
vector_length_ratio 500.0
#
# BLOOM POST-PROCESSING OPTIONS
#
vector_bloom_scale 0.3
raster_bloom_scale 0.425
bloom_lvl0_weight 1.0
bloom_lvl1_weight 0.35
bloom_lvl2_weight 0.25
bloom_lvl3_weight 0.17
bloom_lvl4_weight 0.15
bloom_lvl5_weight 0.14
bloom_lvl6_weight 0.13
bloom_lvl7_weight 0.12
bloom_lvl8_weight 0.11
bloom_lvl9_weight 0.10
bloom_lvl10_weight 0.09