I just tried that and wantend to share it with you...
Cubase SX2:
Duplicate one of your Creamware xxx.dll's in the Cubase-Vstplugins Folder and rename it to vocodizer.dll
Make sure that the vocodizer.dev is also present anywhere in the c:sfpdevicesxxxx - folder. (It depends where you installed sfp to).
Start Cubase.
Create a Group Track. Insert Vocodizer in the first insert-slot.
E. g. load an audio file into Cubase and pan it hard left. Route this signal to the group where the Vocodizer is inserted.
Load any VSTi and pan it hard right. Also route it to the Vocodizer-group.
Press Play and play the VSTi.
Voila!
It is also possible to load presets. You can also use the internal synth, but I didn't manage to change the number of voices so far

But finally it's working!!!!!!!!!