pacs installs script conflics with CCK nodereference install

Attempting to install CCK and pacs at the same time causes an error due to a function being redeclared. I believe this is a trivial error in the pacs install script:

function nodereference_install() {
  switch ($GLOBALS['db_type']) {
    case 'mysql':
    ....

Recommend changing 'nodereference_install' to 'pacs_install' to remove this issue. Patch is attached but probably unnecessary :)