Where are plugin settings saved?

For various network-wide plugins, where are the settings stored?

Is there I way I can redirect the settings to be saved globally?

Example: Ultimate Branding
I want the settings to be saved globally, so a single change effects all sub networks.

Example: Pro-Sites
If I alter the prices, I want them to effect all sub-networks.

I wouldn't even mind if I had to set the varibles via wp-config.php