Probably your easiest way, is storing the documents in a container field, and then having then accessible from whatever platform you wish. You just drag them into the field, and a thumbnail of the file will be shown. By the way, FM12 has upgraded the use of container fields tremendously, you may want to use this version for all it offers regarding Container Fields, plus all the extra functionality it provides.
You could simply store the file paths to the documents in a text field and later launch the file with the path.
With our MBS Plugin, you have function to show open dialog to get path and also you can use File function to launch document in default app.