It would be nice to know how this file is structured and all its possible sections, keys, and values. Does anyone know of documentation on the file format?
Here is a good one .picasa.ini decoded reverse-engineered for Picasa Version(s): 3.8.0 by Franz Buchinger
You might want keep track of the following feature request for Shotwell #1930 (Import albums/meta info from Picasa)
And have a look at avpicfacexmptagger for ideas.