vi esto desde ayer pero no respondia porque te contesto por aqui y por alla vas a decir que no te dejo... a ver...
There actually nothing to configure in Sibelius, Sibelius is a notation software, focused on the music will be printed, how it looks, I only use the controller to play and listen or input notes, but all the knobs faders are useless, just click in File - Preferences -> input device, "Find new device" and my Axiom appears, that's it.
What is what you would like to do with the controller, or what is what you tried ?
I'd say if you don't load a super bunch of samples, used the windows audio controller "Controlador Primario de sonido" (creo se llama)
About the EWQL into Sib is possible just I don't have EWQL, google for EWQL Soundsets for Sibelius 7...Marius, or other can answer this.