How do I add photos to a new thread?

[Ewoodsambo3]

How do I add several photos from my computer to a new thread? i have just been to a derelict building and want to upload the photos in a thread. It says at the bottom 'You MAY NOT add attachments'
????

 

[UrbanX]

[ame]http://www.derelictplaces.co.uk/main/showthread.php?t=16286[/ame]