Tools for working with ChangeSets

> I am trying to file in a changeset that was made for Squeak 3.2,
> but will lock up a 3.8 image when filed in, due to changing some
> really deep stuff with in Object (such as doesNotUnderstand:).
> So I looked for a way to differentiate between the ChangeRecords
> that override an existing method from those that don't, and I
> came across ChangeList.
>
> ChangeList seems to be the object that is created from a .cs
> file, but the class itself seems to be a black box. For
> instance, there is no obviously correct way to create a
> ChangeList from a .cs file without popping up the change viewer
> tool. to do that, I had to copy the class method browseStream:
> to a workspace and did all but the last line (strangely,
> this class seems to be somehow tied to the UI event loop, so
> debugging browseStream: freezes the UI).
>
> Then, once I had a ChangeList without a window, I was able to
> call ChangeList>>changeList to get at the list of ChangeRecords
> and sort them like:
>
> dangerous := changeList changeList select: [:each|
>     each methodClass ifNil: [false] ifNotNil: [
>         each methodClass canUnderstand: each methodSelector]]
>
> and similarly for "safe" changes. Now, again, there is now
> obviously correct way to create a ChangeList from this
> OrderedCollection of ChangeRecords.
>
> The problem is that ChangeList is trying to be both a Model and
> a View (at least that is how it seems to me), and is not doing a
> very good job at either. The tools for ChangeSet manipulation
> seem to be much better, and the only difference that I can see is
> that ChangeList handles external code and ChangeSet handles
> in-image code.
>
> My questions:
> - Is there some tool that does what I am looking for?
> - Why the difference between ChangeSet and ChangeList?
>
> If there is no tools for the task I am attempting, I will just
> keep hacking it.
>
>