Note that +Speech does not come with Messenger Plus! by default. You need to explicitly install the script.
Same goes for the UNeed script which is included in the last Plus! version, but it is not activate by default; you need to explicitly activate it.
So, in normal circumstances, installing Plus! will not let Messenger speek to you out of the blue. That is not possible...
When you download programs, always download them from the official source and never from 3rd party websites as you will never know what is included with them (something harfull may be included).
For Messenger Plus! the official source is
http://www.msgpluslive.net/ or
http://www.msgplus.net/
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