Why don't you go to http://www.sysinternals.com/Utilities/NewSid.html  
  
and ask them if the program is x64 compatible?  It appears they are the  
  
ones publishing the NewSID.  
  
Peter Lawton wrote:

I've been using "newsid" to change the SID on cloned 32bit Terminal servers  
  
for a number of years very sucessfully, I'm about to start doing a new x64  
  
build.  
  
Does anyone know if "newsid" works on x64, or if not an alternative that  
  
does?  
  
Thanks  
  
Peter Lawton

There appears to be a quite an extensive Forum at SysInternals.  I would  
  
think there would be a significantly greater probability getting  
  
relative and desired information in a more specialized forum.  
  
I may be totally off base, though, but it seems to be logical to my way  
  
of thinking.  It is frequently stated that the best source is straight  
  
from the horse's mouth.  
  
Peter Lawton wrote:

I was trying to find out if anyone had used it on an x64 system with out any  
  
problems later on, or if not what they were using instead.  
  
I know it will physically run on x64  
  
Peter Lawton  
  
"Rick" <Rick@discussions.microsoft.com> wrote in message  
  
news:OXF5ghdRGHA.5036@TK2MSFTNGP12.phx.gbl...

It might be easier to "sysprep" the clone image then you wouldn't need  
  
newsid at all.  
  
"Peter Lawton" <devnull@fakedomain.com> wrote in message  
  
news:uJnnY0cRGHA.5592@TK2MSFTNGP10.phx.gbl...

Yes I do use Sysprep for workstations, although not got any x64 ones yet,  
  
but for the Terminal Servers I always found it was easier if one went wrong,  
  
to just pull one of the mirror drives out of a good one, put it in the bad  
  
one, re-name it and newsid it.  
  
I'll just have to give it a go and see what happens.  
  
Peter Lawton  
  
"Martin S." <mart@dslextreme.com> wrote in message  
  
news:1219iih543ncte0@corp.supernews.com...