when can I set a substack's properties?

[Phil Davis]

One forgotten yet exciting (?) detail:

Phil Davis wrote:
-- snip --
> You can do all these same things to any unopened stack. But in the case 
> of an unopened stack that's not already in memory, the first thing that 
> happens when you "touch" it in any way is that is gets loaded into 
> memory. This means you can preload stacks into memory before opening 
> them by just referencing something about them.

You can reference something about the unloaded stack that doesn't 
actually exist, like this:

     get the fakeProperty of stack "bigImages"

Phil