I suggest you upload your dolls to an image host like
http://www.imageshack.us/
http://www.photobucket.com/
They provide the codes and tell you where certain codes can be used like in forums.
To post a doll you need the url (ie:
http://www.imageshack.us/imagename or code.gif, .jpeg, etc.) and place it inbetween the [img][/img] tags.