Interface source
Interface/Classes/UnrealScript classes for client-window behavior, including inventory, status displays, and zone titles.
Shared resource / Client interface
Lineage II interface sources with Core, Engine, NWindow, and a bundled UCC build setup for P166.

Inside the download
Interface P166 includes client-window scripts in Interface/Classes, window APIs in NWindow/Classes, and supporting Core and Engine source trees. The System folder supplies compiler binaries and configuration alongside texture assets elsewhere in the archive.
The archive contains 996 files, including 870 .uc source files across its source trees. Browse the verified paths and short source/configuration excerpts below before downloading the original RAR.
Verified file paths and selected contents from the download.
Interface_P166.rar
Interface/Classes/InventoryWnd.uc
Interface/Classes/ZoneTitleWnd.uc
System/Core.dll
System/Core.int
NWindow/Classes/ActionAPI.uc
NWindow/Classes/AnimTextureHandle.uc
Engine/Classes/AccessControl.uc
Engine/Classes/ActionMoveCamera.uc
Interface/Classes/AbilityWnd.uc
Interface/Classes/AbnormalStatusWnd.uc
Core/Classes/Commandlet.uc
Core/Classes/Locale.uc
System/l2.ini
System/Make_Interface.batSelected verified paths from the archive. This is a file listing, not an in-game screenshot.
Interface/Classes/ZoneTitleWnd.uc
class ZoneTitleWnd extends UICommonAPI;
function OnRegisterEvent()
{
RegisterEvent( EV_BeginShowZoneTitleWnd );
}Class declaration and event-registration excerpt from the included source. Other declarations and methods are omitted.
System/l2.ini
EditPackages=Core
EditPackages=Engine
EditPackages=NWindow
EditPackages=InterfaceSelected EditPackages lines from the included configuration. Other settings are omitted; this is not a verified build recipe.
Interface/Classes/UnrealScript classes for client-window behavior, including inventory, status displays, and zone titles.
NWindow/Classes/Supporting window handles and client UI API classes.
System/Windows compiler/editor binaries, configuration files, and batch scripts.
Core/Classes/Supporting base UnrealScript classes, including Object and Commandlet.
Engine/Classes/Engine-side UnrealScript classes supplied with this build setup.
Windows compiler binaries are bundled. P166 is the archive version label; build success and compatibility with a particular client have not been tested.
Shared through L2JBaylee. Original authorship and reuse terms are not documented in this listing; availability here does not grant an open-source license.