I've used a trick to do this using a container field.
Present the user with a dialog instrucing them to selec the correct file.
Insert file script step, specify the type of file in the options, along with accepted file extensions (fmp12) that you accept. ONLY STORE A REFERENCE.
Now you can get the contents of the container as text and that gives you the path to the file, works cross platform. Set this to a variable... then import with this variable as the path.
I still have to try this! It sounds like a very good solution when plugins are not planned for.
Message was edited by: mariusjostfm