You may just post a hyperlink...there is a limit, I think you have to post quite a few times or be a member for at least a few weeks. But if you've uploaded them on photobucket.com just post the links so we can check it out. Nothing like looking at others stashes!
You can always upload pictures as attachments by scrolling down when you're posting and clicking the button that says, "Manage Attachments." The picture will show up as a thumbnail that we can click on for full size.