See others typing without showing typing

I can’t find the option to turn off the “show typing” so I got to modify YahooMessenger.exe (I’m using version 7.5.0.647):
Hex edit YahooMessenger.exe
1. at hex address 2B63E0, move TYPING forward by 1 Byte to 2B63E1:
545950494E4700 ->00545950494E47
this is to prevent other Y!m from recognising the “TYPING” status packet sent by your Y!m.

3. at hex address 928A2 change 68E0636B00 -> 68E1636B00
(means changing the code “push 006B63E0” to “push 006B63E1”
this is to pick “TYPING” at the right address and compare with the incoming status packet, without this change you can’t see others typing after the modification in 1.