This feature is currently not available ...
Do you even know what I mean? I'm pretty sure the script sets a that header when its crawling. We (at least I do) need that info so IPB can recognize your site as being a search engine. Otherwise it'll be indexing shitloads of "You're not signed in" pages....
Edit: nvm, found out via the scripts homepage. Its just Sphider.
Btw, are you going to index my site?