You don’t need FSUIPC… it’s totally stand alone.
For voice control, you need to “Train Your Profile”. That’s important.
This is for another FS2Crew product but the setup is the same.
You should easily be getting over 90 percent voice accuracy. If you’re are a native speaker, even higher.
We don’t currently do voice commands for toggling the jetway and ground service vehicles. We’ll probably add a voice command for the GPU in the future though.