File chooser dialog & path variables

If I have path variables A,B,C,D,E; then, regardless of the current
directory,
any file operation(*) involving <A>/<some file> should be a quick 2-step
process:
1) from a path variable drop-down menu, select <A> to switch to the
directory corresponding to the path variable A.
This should work regardless of what the current directory is.
It is precisely the point of path variables to save tedious navigation
up & down the file system
as part of selecting any file for whatever purpose.
2) Having selected a directory according to a path variable,
the existing files should be displayed and available for selection.
It should be posssible to create new directories/files too.
(*) the file operations can be
open/save/import/export/merge/diff/compare/analyze/invoke/run
on any kind of "file" or "directory" including a
profile/module/project/report/source file/schema/wizard/application/....
As it is, if I have to load 3 files: <A>/foo <B>/bar <C>/goo
then I have to navigate every time from the current directory to
wherever <A>, <B>, and <C> are.
Very tedious & slow.
-- Nicolas.