[xwiki-users] custom index

Hi, I want to exclude a certain space from showing up in search results at all. I thought it might be possible to do that using the HQL based filter query hinted at here: http://extensions.xwiki.org/xwiki/bin/view/Extension/Search+Application#HSe… (I thought about something like "not doc.fullName like 'spacename.%'", which I have used successfully on MyRecentModifications.) Unfortunately the search administration looks a bit different to me, I can't find HQL filter, all I see is 'Custom index' (or rather 'Benutzerdefiniert indizieren', since I'm running it in German). Where do I define the custom indexing? Am I on the right track at all, or is there a simpler way? (Be aware, I want to get rid of that space everywhere in searches, not just on Main.Search. On Main.Search I have done it successfully already. But the document search within the WYSIWYG editor seems to work independently from that. So I thought I'd take a more radical approach by throwing the space out of the index!) Cheers, Olaf