You know, an idea just struck me (I should recover in a few days

).
It would be not be too difficult to create a module with a form for generating the desired config file for the major snippets; the module would be tabbed, with forms for Wayfinder, Ditto, MaxiGallery with the ability to easily add more tabs for more parameter-prolific snippets as desired (sort of like the help module I did a little while ago).
Basically just have a field for each possible parameter, and the processor ignores the empty fields and generates a config file (file name would be the first field) and puts it in an appropriate folder. Then all you need to do is set the &config parameter in the snippet to point to wherever that file gets written.
Or set this up in the Config tab for each snippet, that would probably be even better. Basically what you get after you enter something in the config field, only it would already be laid out in the nice way you get once you’ve put in the &blah=BlahBlah;type;blah &etc stuff (which I can never remember how it goes). Of course this would mean that the snippet coder would have to make some kind of standardized listing of available parameters plus brief description for the script to parse. Perhaps a separate file that goes in the snippet’s assets/snippets/snippetname folder, that would reduce the footprint of the snippet code as well.