Download for Infraworks R2 (you will need to login to Subscription): http://subscription.autodesk.com/sp/servlet/download/item?siteID=11564774&id=22092239

Webinar on Establishing Existing Conditions:
http://www.cadgroup.com.au/community/blog/cadblog/index.php?s=cdfaa46673f4299416ee99e25d31a01c&showentry=350

Data and Layers:

Infrastructure Design Suite registration: