Narrow gauge railways in New Zealand

We don't know which railway these photos were taken on. Can you help us classify them?

• Blenheim Riverside Railway (8 images)
• Driving Creek Railway (2 images)
• Glenbrook (7 images)
• Kingston Flyer (5 images)
• Mainline (2 images)
• Rain Forest Express (2 images)
• Shanytown (2 images)
• Taieri Gorge Railway (5 images)
• Waitakere Tramline Society Inc. (1 images)
• Whangaparaoa Railway (8 images)