Network-Wide Plugin Settings Management

I’m using WordPress 3.1.2, and have three blogs in a WordPress network. I would like to change some settings for a specific plugin, but have the changes applied to all the blogs on the network. I can’t change plugin settings on the “Network Admin”, and instead have to do it on the “Site Admin” page for each individual blog.

I’m looking for the ability to change settings “sitewide” as is done, for example, by this outdated plugin.

It really depends on the plugin developer and how they incorporate settings. The other option is to try and put it inside the /wp-content/mu-plugins but I’m not sure if that will allow you to have only a master setting. You could also try hard coding it in the plugin files. What plugin is it? I might be able to better help you.