File list (Check if you may need any files):
Core
....\Inc
....\...\Core.h
....\...\FCodec.h
....\...\FConfigCacheIni.h
....\...\FFeedbackContextAnsi.h
....\...\FFeedbackContextWindows.h
....\...\FFileManagerAnsi.h
....\...\FFileManagerGeneric.h
....\...\FFileManagerWindows.h
....\...\FMallocAnsi.h
....\...\FMallocDebug.h
....\...\FMallocWindows.h
....\...\FOutputDeviceAnsiError.h
....\...\FOutputDeviceFile.h
....\...\FOutputDeviceNull.h
....\...\FOutputDeviceStdout.h
....\...\FOutputDeviceWindowsError.h
....\...\FRiffChunk.h
....\...\UExporter.h
....\...\UFactory.h
....\...\UnArc.h
....\...\UnBits.h
....\...\UnBuild.h
....\...\UnCache.h
....\...\UnCId.h
....\...\UnClass.h
....\...\UnCoreNet.h
....\...\UnCorObj.h
....\...\UnFile.h
....\...\UnGnuG.h
....\...\UnMath.h
....\...\UnMem.h
....\...\UnName.h
....\...\UnNames.h
....\...\UnObjBas.h
....\...\UnObjVer.h
....\...\UnScript.h
....\...\UnStack.h
....\...\UnTemplate.h
....\...\UnType.h
....\...\UnVcWin32.h
....\Lib
....\...\Core.lib
Engine
......\Inc
......\...\AActor.h
......\...\ABrush.h
......\...\ACamera.h
......\...\AMover.h
......\...\APawn.h
......\...\APlayerPawn.h
......\...\AZoneInfo.h
......\...\Engine.h
......\...\EngineClasses.h
......\...\Palette.h
......\...\S3tc.h
......\...\UnActor.h
......\...\UnAudio.h
......\...\UnBunch.h
......\...\UnCamera.h
......\...\UnChan.h
......\...\UnCon.h
......\...\UnConn.h
......\...\UnDDraw.h
......\...\UnDemoPenLev.h
......\...\UnDemoRec.h
......\...\UnDynBsp.h
......\...\UnEngine.h
......\...\UnEngineWin.h
......\...\UnGame.h
......\...\UnIn.h
......\...\UnLevel.h
......\...\UnMesh.h
......\...\UnModel.h
......\...\UnNet.h
......\...\UnNetDrv.h
......\...\UnObj.h
......\...\UnPenLev.h
......\...\UnPlayer.h
......\...\UnPrim.h
......\...\UnReach.h
......\...\UnRender.h
......\...\UnRenderIterator.h
......\...\UnRenDev.h
......\...\UnScrTex.h
......\...\UnTex.h
......\...\UnURL.h
......\Lib
......\...\Engine.lib
Help
....\ReadMeSrc.htm
Launch
......\Src
......\...\Launch.cpp
......\...\Launch.dsp
......\...\LaunchPrivate.h
......\...\Res
......\...\...\LaunchRes.h
......\...\...\LaunchRes.rc