Setting up a testing server (MAMP pro) ...FYI
I just wanted to let you know that after a few efforts, I managed to configure this and feel a great sense of achievement. I have used MAMP pro and have found its interface to be very good indeed.
Depending on how you feel about doing this - you may like to update the screenshots on your page explaining where you add data. This is because the whole UI is different in MAMP pro to the windows you showed in your tutorial page.
*I think that the licence for MAMP pro will be well worth the money - since clarity is key for those of us who aren't very techie (like me). It's been very well designed, I think.
One glitch that I came across while previewing (using the testing server) ..was a file permissions problem for a couple of pictures. These didn't show up in the browser even though I had them in the right folder (assets) - so there shouldn't have been a problem. The error was a 403 -
You don't have permission to access /sitename/Assets/Images/library/filename.gif on this server."
I went to the folder for the site within the MAMP / htdocs folder and setup permissions to all be the same. The next time I made a preview, these pictures showed up on the page OK.
Pictures might have odd permissions set, so it's a point worth remembering.