Q: How do I install and configure the Cisco CSR 1000V? A: You can install and configure the Cisco CSR 1000V by importing the OVA file, configuring the VM settings, powering on the CSR 1000V, and configuring the IOS XE software.
: You can still find legacy images on the Cisco Software Download page. Requirements : A valid Cisco.com (CCO) account is mandatory.
Actually, the CSR1000v image is free for registered users. This recent post on Cisco's Learning Network seems to indicate this. I' NetworkLessons.com Cisco CSR 1000v and Cisco ISRv Software Configuration Guide