1) Does anyone know how I can toggle between voice prompt on/off using Destinator 3 SDK?
2) Does anyone have a document/website with Sirf protocol specification? I have to "parse" it to retrieve information like position, satellite count, ecc..
I believe there is some useful information there: http://www.ualberta.ca/~ckuethe/gps/
It appears that chap has managed to get hold of the specifications and protocols for sirf so hopefully the information on that website will help you out.