CleanFileName
What?
When you select images in Picasa and click this button, the characters in the filenames of the pictures that Picasa doesn't like will be replaced by "_":
"-": when searching images, as "-" is a special character in Picasa when searching, so it has its advantages to evade "-' in picture file names.
".": when using the rename tool, "." in a filename can give some odd results.
How to install?
Create the folder C:\Tools\PicasaScripts\ and save the following file in it:
Install the button in Picasa using this link: