It's easy! Just upload a zip file of your photos. Make sure all of the photos you want to upload are jpg files, less than 15 MB in size, and do not contain any periods in the filename (i.e. my.cool.photo.jpg should be changed to mycoolphoto.jpg). Create a zip file of your photos and then upload that new zip file to the site. Your photos will automatically decompress to the area where you uploaded them. Although, there is a 15 MB size limit for each photo, there is no limitation on the size of your zip file.