Setting up a simple book
Firstly the directory structure :-

Beware, if you are using a case sensitive operating system like Linux.
If you are running the book from the local file system only you don't need the css folder or the sampleBNN.html file. The css folder name can be changed - it is simply referenced in the HTML file with this line:-
<link rel="stylesheet" href="css/default.css" type="text/css" />
The sounds folder contains the sounds used for page flipping. Snd0.mp3, Snd1.mp3 and Snd2.mp3 provide the page turning sounds. The location and file names can be set in the control file pages.xml.
You don't need the Audio folder or the AudioTracks.xml if you don't use Audio tracks in your book.
The pages folder is where, conventionally, we put our pages which may be swf, png or jpeg (anything supported by Flash).The location and file names can be set in the control file pages.xml.
The location of the pages.xml file is the only location which cannot change if you are running the software on the local filesystem. Within a browser window it can be changed by passing parameters to the SWF (Another FAQ).
Be aware that straight out of the packet pageflip has a stage size of 800x600 and the default page size is 300x400. If you want to use a background image then make it 800x600 and make your pages 300x400. You can change this as some other users have.
pages.xml must be setup for your book something like this:-
<content background="pages/background.png"
flipsnd0="Sounds/snd0.mp3"
flipsnd1="Sounds/snd1.mp3"
flipsnd2="Sounds/snd2.mp3" />
<page src="pages/FrontCover.png"/>
<page src="pages/page1.png"/>
<page src="pages/page2.png"/>
<page src="pages/RearCover.png"/>
</content>
That's all there is to setting up a simple book with two covers and two pages using the default settings. Oh, BTW, read the XML FAQ to make sure you don't mess up your xml files.
Having done that the two main starting points for tuning pageflip to your liking are :-
FAQ 6 What parameters can go in the <contents> section of pages.xml?
and
FAQ 9 What can go in the <pages> </pages> section?