Some ways to get images into your Picture Application.
Email Attachment: You can send an email to your BlackBerry with an image as an attachment. Then just view the image and save it.
Browser: You can browse to any web page that contains an image, (try images.google.com) select the image and save it. Note: You may have to enter "Select Mode" to select an image that does not contain a link.
BlackBerry Messenger: You can send and receive images using your BlackBerry Messenger Application.