I hacked the Sentinel exe file to change those Custom service types to say something else in Sentinel but as mentioned it is just numbers that are used in the configure files that the scanner uses and the firmware takes service type #225, or wherever the custom ranges starts, and pick the name tag from a list in the firmware, which is encrypted.
/Ubbe
Here's the numeric equivalent for what it's worth.
15-Aircraft, 17-Business, 37-Corrections, 29-Emergency Ops, 4-EMS Dispatch, 9-EMS-Tac, 25-EMS-Talk, 16-Federal, 3-Fire Dispatch, 8-Fire-Tac, 24-Fire-Talk, 13-Ham, 12-Hospital, 11-Interop, 2-Law Dispatch, 7-Law Tac, 23-Law Talk, 31-Media, 30-Military, 1-Multi-Dispatch, 6-Multi-Tac, 22-Multi-Talk. 21-Other, 14-Public Works, 20-Railroad, 32-Schools, 33-Security, 26-Transportation, 34-Utilities, 208-Custom 1, 209-Custom 2, 210-Custom 3, 211-Custom 4, 212-Custom 5, 213-Custom 6, 214-Custom 7, 215-Custom 8, 216-Racing Officials, 217-Racing Teams