Hi Gary,
when you start a new topic, or do a postreply,
there's the place where you write in, and you can scroll down, and you see options and upload attachment, click on upload attachement and do what they ask, it's easy. You can also place your pic. in the pattern library, click above on pattern library, then on upload pattern and follow what they are asking for, it's easy too.
Good luck,
Frieke