RewriteEngine on

RewriteRule /overview/(.*) /xyz/?action=overview;$1
RewriteRule /one/([0-9]+)/(.*) /xyz/?action=one;id=$1;$2
RewriteRule /two/([0-9]+)/(.*) /xyz/?action=two;id=$1;$2
RewriteRule /download/(.+)/(.*) /xyz/?action=download;file=$1;$2