Saving data in standalone

[jbv at souslelogo.com]

Hi list,
I am working on an app for a client who will use it as a standalone.
Basically users will be able to import data such as images, text and
even html from various sources. All these data will self organize in
different groups that the user will be able to select, move around
and organise in a layout, and finally export as a pdf file.
The problem is that all this work will be done in successive sessions,
and between each step there will be the need to temporary save the
work to retrieve it in the next session.
And I'm not sure about the best way to save groups within an LC
standalone and retrieve everything in a similar layout in the
next session, or even if it's possible.
Any idea and suggestion are welcome.

Thank you in advance.
jbv