You can give this a try.
1. Click the "post reply" button at the bottom of the current thread page.
2. See the "Attach Files" option near the bottom of the page? Click "Manage Attachments" and the Manage Attachments dialogue box will appear. Click "Browse" and you will be browsing files on YOUR PC. Click the pics you want to load and hit the upload button. After they upload, close that window and preview your post to see if it worked.
I have attached a couple screenshots to hopefully make it easier. Hopefully this is helpful.