Where's config.ini, I don't see one.
On XP, for a default installation, it would be located in C:\Program Files\GOG.com\Pure Pinball 2.0\Config
For Vista it'd likely be somewhere in C:\Users\Yourname\AppData\ - I can't remember the proper location offhand.
Anyway there's still the problem of game crash when you set some resolutions.
Agreed, I seem to be having problems with the resolution above 1024x768. That's probably worth a separate post.