dual boot cluster (partial off topic)

Has anyone come across a tool that will allow you to do an unattended
boot into another OS across the whole cluster?  I can think of ways of
scripting this w/perl or something but was wondering if it exists
already.

We want to be able to (easily) reboot the whole cluster back and forth
between Linux(es) and Windows.


-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642