Police Lights

How do I add flashing police lights to a car without them?

I think the relevant parts of cPolice.p3d are:

24. "cPoliceLights.bmp"
37. "cPoliceLights_m"
40. "BQG_sired_red7Shape"
41. "BQG_sired_red4Shape"
42. "BQG_sired_red3Shape"
43. "BQG_sired_red6Shape"
44. "PTRN_cPolice"
48. "siren6Shape"
52. "sired_red9Shape"
53. "sired_red6Shape"
54. "sired_red7Shape"
56. "sired8Shape"
57. "sired_red3Shape"
58. "siredShape7"
59. "siredShape9"
60. "sired_red8Shape"
63. "sired_red4Shape"
73. "BQG_sired_red7Shape"
74. "BQG_sired_red4Shape"
75. "BQG_sired_red3Shape"
76. "BQG_sired_red6Shape"
77. "PTRN_cPolice"

You'll then need to modify the Multi Controller > Multi Controller Tracks to contain:
"BQG_sired_red7Shape"
"BQG_sired_red4Shape"
"BQG_sired_red3Shape"
"BQG_sired_red6Shape"
"PTRN_cPolice"
Check the cPolice one for reference

If you need any further assistance I suggest joining The Discord and asking in #mod-help

Thanks,
Josh