Actually, +Speech does not accomplish the same function as RDM Speech. At least from what I read. But I did already post a request for this script in this forum, so you didn't need to make a new thread
+Speech as far as I know, will relay every message you get through MS Sam, but RDM Speech will only do that if the message has the /xspeakit command before it. (So I won't head MS Sam unless me, or a contact send a command with /xspeakit.