ddaydreams,

Real Trees is available as an individual tutorial at the e-on software site. Here is the link:

https://secure.e-onsoftware.com/order/ProductInfo.php?sid=09e8127dd8709a5e907549417fd4a18d&l=1&id=467&platform=notdefined&sid=09e8127dd8709a5e907549417fd4a18d