Thank John, great suggestion.

> Message: 4
> Date: Wed, 1 Sep 2010 19:05:43 -0700
> From: John M McIntosh <johnmci@smalltalkconsulting.com>
> Subject: Re: [Pharo-project] Smalltalk Image writer?
> To: Pharo-project@lists.gforge.inria.fr
> Message-ID:
> <CCE85492-BBB6-4F08-BCC5-84F08A00FA5A@smalltalkconsulting.com>
> Content-Type: text/plain; charset="us-ascii"
>
> You should look at the
>
> http://www.squeaksource.com/SystemTracing
> SystemTracer64 writeImage: 'squeak64.image'.
>
> That is setup to take a 32bit image and create a 64bit image file by writing out all the bits...
>
>