[PD] patcher scripting using $0 ?

[Joseph Larralde]

I'm currently writing some GUI abstractions which have their appearance 
initialized by arguments.
I'm using patcher scripting to achieve this.
I wonder if there is a way to target a top-level patch in another way 
than using its patch name ...
Being able to use $0 in the destination name would be great !

For example : I have a "soundbank" abstraction, which I initialize by 
sending messages to "pd-soundbank.pd"
But what if I want to create various instances of this abstraction ?
If I create a first instance, then a second one with different 
arguments, the first one will receive the initialization messages from 
the second one because it has the same file name.
So for the moment I can only create one instance of this kind of 
abstractions, otherwise all the previously created instances get messed 
up by messages they shouldn't receive.

Hence my question (I couldn't find such information in the docs).

Thanks,
Joseph