Not sure about IAS have not looked but Betchoice start with 1 set of numbers and progress 1 number forward each race.

What i have is a table that i will input each day.

BFV BetChoice
Sale 735182
Wyng 735174
Paug 735198
GCst 735191
Nort 735206

i just use some code to extract the info listed on the left from the betfair race name than i can use a lookup to get the first race number Betchoice use then i just add 1 to this for each race, i also extract the race number so i now how much to go forward, i will e-mail you a copy of my latest sheet for you to look at you might get some ideas to use or even have improvements on what i do.

As i said i was extracting ************** race info the same way but the site is unreliable so i have resorted to copy paste the days info in to my sheet and just extract what i need when i need it.