Register first and then go to ADD/CHANGE YOUR PROJECTS INFO click there and then go to add a new project. Enter title plus description and then press submit. After pressing submit you will see "You can add photos of your project below". You can then add as many images as you want per project.
After this you can upload as many pictures as you want per project. All images will be auto resized.
We suggest you to upload images in your profile, besides the links to your web page, as this gives a better and quick idea to the visitors of your profile.