
This guide will go over how to add SLPs to the interfac.drs file to add new icons. Note that most mods do not keep the unit icons in the interfac.drs file but commonly move it to the gamedata_x1_p1.drs to reduce the file size of the mod.
To add more icons to the game you'll be needing
Firstly open Turtle Pack and you will be presented with the following:

Select DRS editor.
Next open the interfac.drs in Age of Empires II/data by using the icon (as shown at

Now find the icon SLP, ID 50730 for unit icons, ID 50705 for buildings, and 50729 for technologies. Right click on the icon slp you wish to add too and select extract. Save to the desired location.

Minimise this window as you'll need it later. Open up another instance of Turtle Pack, but this time select SLP Editor.

Now open up the SLP you just extracted (the icon shown at

A window will appear as shown below. Click on Add (at

Now back to what the use of the arrows at

Save the SLP. Go back to the DRS editor and right-click the SLP you extracted earlier. Select

Save the DRS you just edited and you will now be able to use the new icon for any mods that you wish.
[This message has been edited by Leif Ericson (edited 03-17-2017 @ 12:24 PM).]