From the README it appears it's exactly the same as any CUCM ISO on CCO, it's NOT bootable but only for upgrades.
README for Cisco Emergency Responder (CER) 7.1(1).
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To upgrade to Cisco Emergency Responder (CER) 7.1(1) download the ISO file from
http://www.cisco.com/cgi-bin/tablebuild.pl/cer
Upgrade Instructions.
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Note: - ciscocm.cerisorename.cop, Cisco Options Package (COP) file must be applied before upgrading from 2.0(1)/2.0(2)/2.0(3) to CER 7.1(1). The ciscocm.cerisorename.cop file can be downloaded from CER Software download page.
1) Navigate to CER Software download page. Download the CER 7.1(1) ISO image.
You'll need to order fresh install media.
HTH
java
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HTH
java
if this helps, please rate