Quote - PP2010 comes with such a script.

Go to menu Scripts / MaterialMods / changeGamma.

Enter 1.
Then select "all props and figures".
Then select "bump".

All bump maps are now gamma=1.

Then do it again for transparency maps.

Or choose the "all of the above" option. Then disp, trans, grad bump, and bump are all set to 1.

Semidieu's script is a lot nicer and graphically richer but this will do the job.

Cool, that sounds great