Here's the way I do it. Go to this website-

http://tinypic.com/?t=postupload

Click browse and find the photo you want to upload, then choose the file size (I tend to go for the website/email size), then click upload. Type the code thing it comes up with to prove you aren't a computer, then the picture will upload. Once it has uploaded copy and paste the web link (there are a number of links, but the one to use will look like [img]picturelinkthingy[/img]) onto here, and your picture will appear.