We had succesfully enable the image tag to display images in SingAstro Album and after a few weeks of testing, I think it should be working without problems.
Below is the instruction on how to use it:
1) Post your image in the album normally.
Example:

2) After the image is posted, go to the specific album that you post the image in and you should see the thumbnail images in that album. Look for the image that you posted, you should be able to see a "Edit" under your posted image. This indicate that you are the owner of the images.
Example:

3) Click the "Edit" link and it'll show you the edit picture information page.
Example:

4) Select and copy (Control-C for Windows user) the whole "[ img ] ... [ /img ]" tag beside the "BBCode".
Example:

5) Paste (Control-V for Windows user) the image tag that you just copy in location that you want the image to display in the message.
Example:

6) Post the message and you'll see your image display in your message.
Example:

Have a nice day.