How can I remove link "music"

You need to open inc/design.inc.php in your favorite text editor. Search for getSiteStat and scroll down till you see:

'pmu' => array('capt'=>_t("_Music"), 'query'=>"SELECT COUNT(`ID`) FROM `RayMusicFiles` WHERE `Approved`='true'",'link'=>'browseMusic.php','adm_query'=> "",'adm_link'=>""),

and just put // in front of that line. Save and you're done.

oops sorry I didnt read (2). You need in the same file to find:

'pts' => array('capt'=>_t("_Posts"), 'query'=>"SELECT IF( NOT ISNULL( SUM(`forum_posts`)), SUM(`forum_posts`), 0) AS `Num` FROM `pre_forum` ",'link'=>'orca','adm_query'=> "",'adm_link'=>""),

and edit the 'link'=>'orca' part to whatever you need it to link to.

'link'=>'forumz.php' for example.