/facepalm
You're a bit new to MW2 Hacking I can see...
I'll explain the SAY command, but not the models. I'll post a link to the Modding Models thread.
For the SAY command you would write something like this:
set 1opt1 "Hi;bind button_x vstr 1opt1r"
set 1opt1r "say Hi"
For the modded models, follow this tutorial:
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