Umm, sounds to me like you fixed it yourself.
I mean, if the noise and rubbing is gone, what's to fix? Nobody has ever actually walked up to me and asked me to 'pop the hood' on my 01 Sable. Ever. I'm being a bit sarcastic, yes, but really, you have a lot of miles on yours already, so what's to worry about? You probably hit a bump or something and one of the plastic screws stripped. Hell, zip ties probably hold half of the space shuttle together. If you use the right color and trim the ends, they'll hold better than the original screws and no one will notice. They certainly won't care. Sounds like you got a cheap solution. That said, however, you probably SHOULD get an alignment done to make sure that's what it really is. You might have one tire slightly toed/cambered/whatever it is, and wearing one tire on the inside. Since you did just put new shoes on it...
