The FAQ was showing a specific example of replacing an existing file that was already there, looking at its properties before you deleted it, then deleting it, then resetting the properties after you put the new copy into place.

In your case, you are putting brand new files onto the player from scratch, so looking at what you'd already put in place (with the wrong file permissions) isn't going to help.

You needed to set the X permission, which is executable. Hence the 755.

My big beef here is that people who write and distribute software for the car player need to support their own distributions by supplying scripts or at least proper detailed instructions so that Linux newbies can install the thing. Leaving out important information like "chmod 755 the following files..." causes problems like the one above.