This is a simple applet that allows you to select the line-in input on the Squeezebox Radio by holding the Home or Sleep button on either the remote control or the device itself.
There is a simple option in the Settings screen that sets the startup behaviour:
Enable - Selects the line-in when the Radio starts.
Disable - Deselects the line-in when the Radio starts.
Do Nothing - Leaves the input set to its previous setting (Default).
There is one caveat when using the Enable option: The device must not be set to resume playback automatically. Otherwise the line-in is selected and then immediately unselected when playback resumes.