Fix for re-imaging Lenovo X61t laptops

Problem:
Re-imaging using Clonezilla and rebooting a Lenovo X61t laptop threw up the error "Signature Failure"

Solution:
Quoting from http://www.ecs.umass.edu/pipermail/umasslug/2008-August/003380.html

However:  I did get the idea from various 
websites that it seemed to be an issue with the MBR, so I started 
playing with options in Clonezilla.  It turns out that if I de-select 
the -g auto and -r options, and select -t1, the system works.  I've just 
confirmed on two of the broken systems, so it looks like it's going to 
be a consistent fix.

  It looks like this is a common issue on the Lenovo laptops, so I'm 
glad to have found a solution.  (Also, I've got six more to image today, 
and possibly more next week...)

That worked.  It appears that -t1 replaces the MBR with the pre-made syslinux MBR.a