I've not used the radio hack that Chevy references in the OP, so I thought I'd give it a go today. I've got the moto help drivers installed and up to date but when I run RadioComm I get nothing, the phone isn't showing up. I've changed USB cables and USB ports on the PC I'm using (which is a win7 64bit machine). Has anyone else applied the radio hack to the SD3 5.3? Can anyone give me some advice on next steps to troubleshoot?