I guess it just isn't my day. I downloaded the firmware update and put it on a usb drive, but the TV keeps telling me that there is more than one file on the usb drive, even though there is only one. I've even tried reformatting the usb drive to ensure it was empty, but its still a no go. I'm using a Mac computer running OSX snow leopard, but it is able to format the usb drive to fat32 which is what I've done. If I can't get it to work after playing with it a little more, I guess I'll have to re-download the file at work on a Windows machine and copy it to the usb drive there.
I checked my Walmart receipt but there was no mention of their return policy, so I called the local store and they said it would be 90 days as long as you have the receipt. They also mentioned that they have a Panasonic 46" plasma in stock for $788. The Panasonic plasma is model TC-P46U1. Other than being a 1080P set, I don't know much about it. Hopefully, I can get this Sharp set to work with rest of my source devices so I can keep it as I like the looks of it, and the way it works with my HR-20.