1) Click the "Manage Attachments" button under the text window.
2) When the new window opens, click the "Browse" button, another window opens where you navigate to the picture files stored on your computer.
3) When you find the file, click it (it turns color) then click the "Open" button in the lower right corner.
4) Your selected file should now appear in the Manage Attachments window. You can repeat step 2 and 3 three more times for a total of 4 pictures at a time. You can attach up to 15 pictures per post. The maximum file sizes are noted at the bottom of the Manage Attachments window.
If you get a "file too large" error, you will have to re-size the pictures with another program like IrfanVeiw
or PhotoShop. If you are taking pictures with a newer digital camera, then you can set it to take smaller pictures so you can skip the re-sizing step.