Start Skype on your radio computer.
Start CommCat or QSXer and make sure it is controlling your radio properly and that the port/IP settings are correct.
Start Skype on your iPad and call the radio Skype account. You should hear your radio audio.
Click the Home button on your iPad to send Skype to the background. You should continue to hear your radio audio.
Start CommCat Mobile on your iPad and enjoy remote operation.
Note that if you are using the Macros in the CommCat Tuner window to operate CW, audio to your radio's microphone is not required.
You can use Mute in the iPad Skype app to turn off the iPhone mic. This step is recommended when you are operating CW or just listening.