When using Read function in Adobe reader to read pdfs only MS Sam is available
i wanna add more persons first i had downloaded many new persons but that
was more than 2 yrs agon now dont even recollect how i did that.
With SAPI4.0 runtime engine, MS had 2 more characters by the names 'MS Mike' and 'MS Mary'. I think they should be already installed in your TTS engine by default. Incase they arent installed, u can get them from Text-to-Speech Voice Download Guide
Also, CMU has their own innovations in the Speech recognition/synthesis. Even the first-half on my ongoing AI project had the incorporation of the TTS engine and MS agent. With SAPI5.0 i had got some 4 default bots and the above 3 different speech voices. Your problem can be completely overcome by installing the latest SAPI engine from MS site.