I understand the liability issue, but it is good to have a more serious forum (not one with 50 'how do I install a ceiling fan' posts) where people not in the industry (like me) can come with questions or just lurk and learn.
As for the light switch problem, leave one switch off. Turn the second one on for a minute or two and then back off. Turn the third one on and run up to the attic. If the light is on, it's switch 3. If it is off and cold, it's 1. Otherwise it is 2.
And yes, the radio would be easier :-)
