So the thread that showed how to add a CC on a ticket specifically says that it won't work on 1.6RC5. I actually was able to figure out something that worked well enough. Basically, it adds another email address to the 'To:' field.

Add the fields to the database

mysql> alter table ost_ticket add column ccEmail varchar(120) after name;

mysql> alter table ost_ticket add column ccName varchar(32) after ccEmail;

in /include/class.ticket.php

class Ticket{

var $id;

var $extid;

var $email;

// Change to add cc to ticket

// J. Pastin 10-15-09

var $ccEmail;

var $ccName;

// End Changes

var $status;

var $created;

var $updated;

var $lastrespdate;

and

if(($res=db_query($sql)) && db_num_rows($res)):

$row=db_fetch_array($res);

$this->id =$row;

$this->extid =$row;

$this->email =$row;

$this->fullname =$row;

// Change to add cc to ticket

// J. Pastin 10-15-09

$this->ccEmail =$row;

$this->ccName =$row;

// End Changes

$this->status =$row;

and

function getName(){

return $this->fullname;

}// Change to add cc to ticket
// J. Pastin 10-15-09
function getCcEmail() {
    return $this->ccEmail;
}function getCcName() {
    return $this->ccName;
}// End Changes
function getSubject() {
    return $this->subject;
}

and

//Reply separator tag.

if($cfg->stripQuotedReply() && ($tag=$cfg->getReplySeparator()))

$body ="\n$tag\n\n".$body;

if(!$dept || !($email=$dept->getAutoRespEmail()))

$email=$cfg->getDefaultEmail();

if($email) {

// Change to enable cc on ticket

// J. Pastin 10-21-09

if($this->getCcEmail()!='') {

$address=$this->getEmail().",".$this->getCcEmail();

$email->send($address,$subj,$body);

} else {

$email->send($this->getEmail(),$subj,$body);

}

//$email->send($this->getEmail(),$subj,$body);

// End Changes

}

and

if($cfg->stripQuotedReply() && ($tag=$cfg->getReplySeparator()))

$body ="\n$tag\n\n".$body;

if(!$dept || !($email=$dept->getEmail()))

$email =$cfg->getDefaultEmail();

if($email && $email->getId()) {

// Change to enable cc on email

// J. Pastin 10-21-09

if ($this->getCcEmail()!='') {

$address=$this->getEmail().",".$this->getCcEmail();

$email->send($address,$subj,$body,$file);

} else {

$email->send($this->getEmail(),$subj,$body,$file);

}

//$email->send($this->getEmail(),$subj,$body,$file);

// End Changes

}

and

function create($var,&$errors,$origin,$autorespond=true,$alertstaff=true) {

global $cfg,$thisclient,$_FILES;

$id=0;

$fields=array();

$fields = array('type'=>'string', 'required'=>1, 'error'=>'Name required');

$fields = array('type'=>'email', 'required'=>1, 'error'=>'Valid email required');

// Change to add cc to ticket

// J. Pastin 10-15-09

$fields = array('type'=>'email', 'required'=>0, 'error'=>'Invalid cc Email Address');

$fields = array('type'=>'string', 'required'=>0, 'error'=>'Invalid cc Name');

// End Changes

$fields = array('type'=>'string', 'required'=>1, 'error'=>'Subject required');

$fields = array('type'=>'text', 'required'=>1, 'error'=>'Message required');

and

if(!$dept || !($email=$dept->getAutoRespEmail()))

$email=$cfg->getDefaultEmail();

if($email)

//Change to enable cc on ticket

// J. Pastin 10-21-09

if($var!='') {

$address=$var.",".$var;

$email->send($address,$subj,$body);

} else {

$email->send($var,$subj,$body);

}

//$email->send($var,$subj,$body);

// End Changes

and

$sql= 'INSERT INTO '.TICKET_TABLE.' SET created=NOW() '.

',ticketID='.db_input($extId).

',dept_id='.db_input($deptId).

',priority_id='.db_input($priorityId).

',email='.db_input($var).

',name='.db_input(Format:($var)).

// Change to add cc to ticket

// J. Pastin 10-15-09

',ccEmail='.db_input($var).

',ccName='.db_input(Format:($var)).

// End Changes

',subject='.db_input(Format:($var)).

',topic='.db_input(Format:($topicDesc)).

and

if($email){

//Reply separator tag.

if($cfg->stripQuotedReply() && ($tag=$cfg->getReplySeparator()))

$body ="\n$tag\n\n".$body;

// Change to enable cc on ticket

// J. Pastin 10-21-09

if($ticket->getCcEmail()!='') {

$address=$ticket->getEmail().",".$ticket->getCcEmail();

$email->send($address,$subj,$body);

} else {

$email->send($ticket->getEmail(),$subj,$body);

}

in include/client/open.inc.php

 <font class="error">* <?=$errors?></font>

</td>

</tr>

<tr>

<th width="20%">Secondary Name:</th>

<td>

<?if ($thisclient && ($name=$thisclient->getName())) {

?>

<input type="hidden" name="ccName" value="<?=$ccName?>"><?=$ccName?>

<?}else {?>

<input type="text" id="ccName" name="ccName" size="25" value="<?=$info?>">

<?}?>

 <font class="error">nbsp;<?=$errors?></font>

</td>

</tr>

Change made to add cc to ticket

J. Pastin 10-15-09

<tr>

<td nowrap >Secondary Email Address:</td>

<td>

<?if ($thisclient && ($email=$thisclient->getEmail())) {

?>

<input type="hidden" name="ccEmail" size="25" value="<?=$ccEmail?>"><?=$ccEmail?>

<?}else {?>

<input type="text" id="ccEmail" name="ccEmail" size="25" value="<?=$info?>">

<?}?>

 <font class="error"> <?=$errors?></font>

</td>

</tr>

End Changes

<tr>

<td>Telephone:</td>

<td><input type="text" name="phone" size="25" value="<?=$info?>">

 Ext <input type="text" name="phone_ext" size="6" value="<?=$info?>">

 <font class="error"> <?=$errors?></font></td>

</tr>

in include/client/viewticket.inc.php

<tr>

<th width="100">Name:</th>

<td><?=Format:($ticket->getName())?></td>

</tr>

<tr>

<th width="100">Email:</th>

<td><?=$ticket->getEmail()?></td>

</tr>

Change made to add cc to ticket

J. Pastin 10-15-09

<tr>

<th width="100">Secondary Name:</th>

<td><?=Format:($ticket->getCcName())?></td>

</tr>

<tr>

<th width="100">Secondary Email:</th>

<td><?=$ticket->getCcEmail()?></td>

</tr>

End Changes

<tr>

<th>Phone:</th>

<td><?=Format:($ticket->getPhoneNumber())?></td>

</tr>

in include/staff/viewticket.inc.php

<tr>

<th>Email:</th>

<td><?php

echo $ticket->getEmail();

if(($related=$ticket->getRelatedTicketsCount())) {

echo sprintf('  <a href="tickets.php?a=search&query=%s" title="Related Tickets">(<b>%d</b>)</a>',

$ticket->getEmail(),$related);

}

?>

</td>

</tr>

Change to add cc to ticket

J. Pastin 10-15-09

<tr>

<th>Secondary Name:</th>

<td><?=Format:($ticket->getCcName())?></td>

</tr>

<tr>

<th>Secondary Email:</th>

<td><?php

echo $ticket->getCcEmail();

?>

</td>

</tr>

End Changes

<tr>

<th>Phone:</th>

<td><?=Format:($ticket->getPhoneNumber())?></td>

</tr>

in include/staff/newticket.inc.php

<tr>

<td align="left" nowrap width="20%"><b>Email Address:</b></td>

<td>

<input type="text" id="email" name="email" size="25" value="<?=$info?>">

 <font class="error"><b>*</b> <?=$errors?>

</font>

<? if($cfg->autoRespONNewTicket()) {?>

   

<input type="checkbox" name="alertuser" <?=(!$errors || $info)? 'checked': ''?>>Send alert to user.

<?}?>

</td>

</tr>

Change to add cc to tickets

J. Pastin 10-15-09

<tr>

<td align="left" >Secondary Name:</td>

<td>

<input type="text" id="ccName" name="ccName" size="25" value="<?=$info?>">

 <font class="error"> <?=$errors?></font>

</td>

</tr>

<tr>

<td align="left" nowrap width="20%">Secondary Email Address:</td>

<td>

<input type="text" id="ccEmail" name="ccEmail" size="25" value="<?=$info?>">

 <font class="error"> <?=$errors?></font>

</td>

</tr>

End Changes

<tr>

<td align="left">Telephone:</td>

<td><input type="text" name="phone" size="25" value="<?=$info?>">

 Ext <input type="text" name="phone_ext" size="6" value="<?=$info?>">

<font class="error"> <?=$errors?></font></td>

</tr>