Learning from the book--Augmented Reality A Practical Guilde

Mike and I were gonna go to Cat Hill Lansdown Centre yesterday and today,
but the snow is still a lot outside.
The biggest snow in 18 years!
so we emailed some people for help and hopefully they can guilde us to a good direction.
Also we got a book today--Augmented Reality A Practical Guilde.
We got some information from the book,
the website http://www.artag.net/
it provide us a programme,Artag,which is similat to BuildAR that you can create your own models and programme them into this programme. The advantage of this programme is that you can programme in materials of the models,which makes your models look vivid. The book also tolds us that what kind of files we should create in order to match this programme. However,most information in this book we can't understand as it is about coding languages for the programme.