To upload photos, users should access the advanced reply menu and click the paper clip icon for attachment options. For external hosting, sites like imageshack.us or photobucket.com can be used, but some users reported issues with invalid links. Images can be directly embedded in posts in the General Discussion forum using specific image tags, while other forums require attachments. Profile pictures and certain features are exclusive to contributors, which has sparked some frustration among users. To share images in posts, users should copy the "direct link to image" or "Hotlink for forums" text after uploading.