Thread:Project:Support desk/resetting wiki to an old date after some hacking

how do i reset mediawiki to an old status, so that all newer revisions will be deleted? i am searching a batch solution, so that not every changed page has to be touched. this is necessary because of some hacking. ;-(

MediaWiki 	1.15.1 PHP 	5.2.14 (cgi-fcgi) MySQL 	5.1.51-log