1. Go to 'cstrike/addons/amxmodx/configs' and open the config file 'grenade_callouts.ini' on Notepad.
2. Copy the texts below and replace the FIRST 9 LINES in the config file with the copied texts. Save and exit.

Flashbang.
Deploying flashbang.
Throwing flashbang.
Fire in the hole!
Throwing grenade.
Grenade out!
Smoke!
Throwing smoke.
Laying down smoke.