[Newbies] Adding or Install new category on squeak

[Eric Caruyer]

Hello,

Trying the "hello world" samples, i saw that i didn't have the Speaker 
class on my image. ( by looking the class browser ).
I would like to install the Speech-TTS category on my Squeak 3.10.2. but 
i didn't found the good tutorials.
Is there someone that can point me to the good one ?

Thanks in advance !

Eric.

PS : Is there a relation between Squeak The Mouse ( Mattioli's character 
)  and Squeak the Free Morphic implementation of SmallTalk ?