Thread:Project:Support desk/change media wiki directory

i had set up a wiki here: http://www.scoutmorciano.it/ScoutWiki/ obviously my file are in this directory of the server "ROOT/ScoutWiki" i want to move file on the server to the new directory "ROOT/mediawiki" but without changing original URL (http://www.scoutmorciano.it/ScoutWiki/) how can i do?