Similary write code for each smiley in a new line.
When finished, save as smilies.pak in the same folder where there are images are present.
Now copy all these files (images/ smilies and smilies.pak files) in phpbb_root/images/smilies.
Login to admin pannel of the forum and go to POSTINGS > SMILIES
Click on link "Install Smilies Package".
On new page, you will see smilies.pak listed in the txt field with 3 options.
Replace Matches
Keep All
Delete All
Selection 1st option will replace any match with the new one.
Keep All will keep all old and new smilies, creating duplicates.
Delete All will delete all old smilies and install new ones.
Select the option you want to have and press "Install Smilies Package" button.
The .pak file must have a comma at the end of every line - including the last smilie - and must end with an empty line. If not then you get the "Incomplete information" error message.