Click on "Gallery" in the blue header above
Then click "Gallery Links" from the same blue header
In that drop down box you should see, second from the bottom..."Upload photos" - Click that.
Then it will let you select 5 pics (one at a time) from your computer. Click on "Choose File" and find the pic you want. If they're really big megapixels, I've found it bombs out if I do more than 2 at a time. So I'd hit "Upload/submit" after those 2, then just do a few at a time.
If they're smaller files, you can do all 5 at once.
Sometimes, after it's done uploading your pics, it will show another screen where you have to click at the bottom of screen..."Process".