How to use other TTS Engines?

[Lope]

Like from Acapela Telecom?
Has a folder structure like this:

NextUp-Acapela\data\aaron22s.dat
NextUp-Acapela\data\abb_usa.txt
NextUp-Acapela\bin\ACATEL.LICENSE
NextUp-Acapela\bin\acatel_gui.dll
NextUp-Acapela\APIs\SAPI4\acatel_itfs4.dll
NextUp-Acapela\APIs\SAPI5\acatel_itfs5.dll
NextUp-Acapela\bin\acatel_srv.exe
NextUp-Acapela\BabTTS\bin\BabilSynth.dll
NextUp-Acapela\BabTTS\bin\BabTtsDlg.dll
NextUp-Acapela\BabTTS\bin\BrightSpeech.dll
NextUp-Acapela\bin\elp.dll
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.bnr
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.f0r
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.nfo
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.oso
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.rxt
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.tml
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.trr
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.bab.dca
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.bab.ldi
NextUp-Acapela\BabTTS\Engines\USEnglish\enu.notag.bnr
NextUp-Acapela\data\exc_usa.txt
NextUp-Acapela\bin\libvoyellise.dll
NextUp-Acapela\bin\mtsyc32.dll
NextUp-Acapela\bin\ShutdownAcapelaServer.exe


Is eSpeak mbrola much better? is it worthwhile?