.falloff file creation?

[Dieter Mayr]

Photozone provides a whole lot of of data for various lenses on various cameras, especially the data to use for PWP for the distortion correction.
I have created a whole bunch of *.lensdistortion files with that data for almost all my lenses.
Is there a way to create a *.falloff file with the Vignetting data provided on their website ?
As example the site for a Nikkor 24mm f/2.8 on FX format:
http://www.photozone.de/nikon_ff/551-ni ... ff?start=1

[jsachs]

It does not look like they give enough information to specify the light falloff curve.