Are the pics in your Photos/Camera Roll ?
If so :
Reply to Topic.
Write your text in the box as usual, put a return in so cursor
is below the text.
Scroll down below the text box, click Manage Attachments
Click Choose File at top.
Click Photo Library.
Click Camera Roll
You should now see a column of your photos.. on my iPad,
I click on one photo, and click on the top "upload" button,
the pic shows as uploaded... then just close that window and
click "Submit Reply".. pic should be at bottom of message.
There are file size and file extension limits.. they're listed.