Forum:Search Message

How do you change this following default test on the search bar?: "Search this Wiki" -Imdill3 20:11, May 28, 2010 (UTC)
 * You'll have to edit MediaWiki:Tooltip-search. Special:Allpages provides a list of interface messages. Mark  ( talk ) 20:48, May 28, 2010 (UTC)
 * Thanks Mark xD (Cya later on HabboWiki) -Imdill3 20:51, May 28, 2010 (UTC)