Installation:

1.) Download and install the "Claude now says" mod: https://www.gtainside.com/en/gta3/mods/95426-claude-now-says
2.) Extract the Audio folder into the root directory of your game
3.) Check every folder inside "CustomTalk" and delete every file named "priority". 
(I can't perform this one for you, because the "priority" files are created by Claude now says).
4.) Enjoy the mod :)