It's pretty easy, even for a person who is not very familiar with computers/internet. The first step is to sign up. I use photobucket. It's free and easy. Once you sign up, you log in, just like logging into an email account, and click "upload." You will then need to select the pictures you want to upload and upload them. Once uploaded all you need to do is scroll over the picture in your album and you will see a bunch of different urls pop, I use the "img" one at the bottom. Copy it and past it into a reply and you should be good to go. Once you do it once, it will become much easier.