paypal php/mysql

"Do this by sending your post data to a separate processing script, and  inserting the required data into the database, then re-posting the data  to paypal."

I am not sure how to send the form to two scripts this is how its working at the moment:

<form action="paypal/process.php" method="post" enctype="multipart/form-data" name="booking">
  
   <label class="bday2">First Name:</label><span id="sprytextfield1">
   <input type="text" name="firstname" id="firstname" />
   <span class="textfieldRequiredMsg">A value is required.</span></span>
   <br />
  
      <label class="bday2">Ticket Type:</label><select name="amount">
   <?php if ($row_event['single_price'] !="") {?>
   <option label="Single - &pound;<?php echo $row_event['single_price']; ?>" value="<?php echo $row_event['single_price']; ?>"><?php echo $row_event['single_price']; ?></option>
   <?php } else {?>
   <option label="Single - &pound;FREE" value="0.00"></option>
   <?php };?>
   <?php if ($row_event['table_price'] !="") {?>
   <option label="Table - &pound;<?php echo $row_event['table_price']; ?>" value="<?php echo $row_event['table_price']; ?>"><?php echo $row_event['table_price']; ?></option>
   <?php } else {?>
   <option label="Table - &pound;FREE" value="0.00"></option>
   <?php };?>
   </select>

   <br /><br />
   <input name="order" type="submit" id="order" value="Order" />    
  
</form>