Alter event reminder interval selection

[Gizmo999]

thanks sorry for slow reply i've just come back to this. I'm no further forward, probably back a bit further as I'm now getting php errors when I edit the functions_calendar.php with the additional array options

PHP Code:

$reminders = array( 
    '3600'   => 'one_hour', 
    '7200'   => 'two_hours', 
    '10800'  => 'three_hours', 
    '14400'  => 'four_hours', 
    '21600'  => 'six_hours', 
    '28800'  => 'eight_hours', 
    '43200'  => 'twelve_hours', 
    '64800'  => 'eighteen_hours', 
    '86400'  => 'one_day', 
    '172800' => 'two_days', 
    '259200' => 'three_days', 
    '604800' => 'seven_ days', 
    '1209600' => 'fourteen_ days', 
);