Hi
If you are manually looking for trainer names spelling as per Betfair API, put MFP in Full Mode or Race Mode and read the trainer name from the silks data. A trigger could also write this data to a text file for future reference.
Variations I've seen on example trainer: Tim Easterby, TD Easterby, Timothy D Easterby etc...
my suggestion here would be to use the FIND function on the surname only: FIND("Easterby", "silk_trainer") is greater than 0