How do you bind a key in COD4

I will use the letter b for this description but you can use any letter but be in mind that say if you bind w that will take you forward walk away so becarful. here it is type in console /bind b say Look i have a bind! you can even do it in colors just say
/bind b say ^1Look ^5 I ^6 have ^2 A ^3Bind
Hope that helps :)