Addendum regarding GoodReader

I was just writing some simple instructions for my mom about getting a pdf from an email attachment to GoodReader, and I realized that others might find them to be useful. So, here they are:

Open the email from me that includes the attachment.  Then tap on the icon for the file itself.  The file will open right then on your screen.  Tap once in the center of your screen and the title of the file will appear at the top.  To the right of the file title is an icon of an arrow leaping out of a box.  Tap on that icon.  Choose the second button down, "open in...".  On that list should be GoodReader, which will swing into place if you choose it.  

I hope this helps GoodReader be useful!