Rob, If you go to Member Galleries, you will be able to upload a photo from your computer there. Then once it is in your gallery, you can easily insert a thumbnail of the photo into any thread.
If you get stuck, there are some 'sticky' threads at the top of the Beginner's Questions forum which give help on resizing, uploading and inserting photos into threads.
I hope you will be able to save the Zygo! If you've caught it soon enough, it should come through alright.
