Hi, welcome...
once i had answerpad (Fun but rubbish), Artificial Conversation Entity(alicebrain), and hal5 talking on the same pc... with me butting in....
I had all of them talking out of the speakers (Quite loud, mine in running thru my mixer into an amp, any will do).. all programs turn speech recognition on....
because they are all talking Perfectly for the speech recognizer microsoft... they have no trouble recognizing each other. just give them different voices or Agent characters...