These are pages of an iPhoto book that were converted to JEPG files in iPhoto via the Print to PDF/Save PDF to iPhoto print option.  This method assembled the book into a PDF file, created a 2200 ×1650 pixel jpg file of each page and imported them into a new iPhoto album.  The album was added to this iWeb page via the Media/Photos browser.  The file size for each slide was reduced to 800 pixels x 600 pixels, the default image size for any photo page/slideshow created by iWeb. 

iPhoto Book To PDF to iPhoto to iWeb