Setting up Harmony 880 with Receiver, TV, PS3

Hi,
So I have all the components

• Harmony 880
• Sony HDTV
• PS3
• Onkyo TX-SR607
• ATT Uverse internet and cable
• x10 IR extender
• PS3IR-500 for PS3

My question is how do I setup TV, PS3, and Onkyo for Harmony 880.

I couldn't find a good How-To article anywhere. I tried setting up the TV and Onkyo for "Watch TV" activity but I can't get the PS3. I have Harmony configured in PS3 but when I switch to Game it says no-signal. I have PS3 connected via HDMI to "Game" input, also labeled as IN4.

I have PS3 setup using "Watch a movie" activity for PS3IR-500 device.

Please guide.

Thanks,
Prince

I moved your post out of How-To. That forum is not meant for questions and answers.