Are the pics already on your computer ? If they are when you go to post , down under the main block where you type in a response there is an area that says
File attachments :
then 3 boxes== one is white --- one is gray--- one says browse
click on the browse button, that will open your computer files. look for the one where your pics are stored. Once there find the pic you are looking for , click on it, then open, then add attachment .the white box is where you could type in a description of the pic if you wanted to . you can add three to begin with , after that post the message, and then it will let you add more pics if you wanted to add more
Does that help ?