To add an image to your layout, you'll need to copy it over to your iPad's Photo Roll. You can do that by e-mailing it to yourself and opening the e-mail then saving the image. Another option is to copy it to Dropbox, Google Drive, or iCloud, saving the image for offline use, then clicking on Export to photo roll. You then go to LumaBooth, Print Layout, and click on Add Image icon in top right hand corner then select your image.
For Virtual Attendant, click on the Add button and it will allow you to choose your animation from your iPad gallery.
For Stickers: Choose your stickers from the camera photo roll. Make sure these are png files.