You can do two things:

1) From a MC changes browser (either via 'Changes' button or via
'History') you can file out all changes (don't select any item and
press yellow).

2) From a .mcz, you can get the sources: open a FileList, select a
.mcz, press 'open zip' button, there is a snapshot/source.st file you
can extract

Nicolas

2011/5/12 Frank Shearar <frank.shearar at angband.za.org>:
> Hi,
>
> I'm trying to load Lukas Renggli's Helvetia into Squeak. It has many, many
> dependencies on things I don't need - OmniBrowser, ECompletion, Polymorph,
> ...
>
> These dependencies prevent me from simply loading an mcz into my image. I
> know I can do this, with the undeclared classes and such going to
> Undeclared, but sometimes this doesn't work: loading the package expects
> certain behaviours in my image that don't exist, and things break badly.
>
> What I'm currently doing is taking the Helvetia image, and filing out things
> by hand. As you can imagine, this is pretty tedious: I file out each system
> category, and then file out the individual overrides/extensions for that
> package.
>
> What would really be super awesome is for me to be able to say "Monticello,
> load _this_part_ of the snapshot". Or even be able to say "file out
> _this_part_ of the snapshot".
>
> Does such functionality exist? (Mea culpa; I have not looked.)
>
> frank
>
>