Open Stack

Hi all,

I am trying to modify a stock image (http://cloud-images.ubuntu.com/)
to include the software needed for our particular tasks (graphical
environment, engineering software, word processor, printer, etc).  To
do this I made all the changes I need to an instance and took a
snapshot.  Is there a way to "reset" the image so the initial
cloud-init procedures will be called for importing ssh keys (and any
other setup it may do)?

Thanks,
Sam