Change Logon Background image in Windows Vista installation

I thought i would share the code i created that will change your Windows Vista Logon background image during Windows installation.
Accepts any image format.

Updated 09/02/2015

Code:

using System;
using System.Runtime.InteropServices;
using System.Globalization;
using System.IO;
using System.Security.AccessControl;
using System.Security.Principal;
using System.Drawing.Imaging;
using System.Drawing;
using System.Text;

namespace imageres
{
    class Program
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern IntPtr BeginUpdateResource(string pFileName, [MarshalAs(UnmanagedType.Bool)]bool bDeleteExistingResources);
        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool UpdateResource(IntPtr hUpdate, string lpType, uint lpName, uint wLanguage, byte[] lpData, uint cbData);
        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern bool EndUpdateResource(IntPtr hUpdate, bool fDiscard);
        public static string RootPath = Environment.GetFolderPath(Environment.SpecialFolder.System);
        public static string msoobe = "";

        //Do the work
        static void Main(string[] args)
        {
            try
            {
                if (IsOS())
                {
                    if (File.Exists(RootPath + @"\imageres.dll"))
                    {
                        if (!File.Exists(RootPath + @"\imageres.dll.BACKUP"))
                        {
                            File.Copy(RootPath + @"\imageres.dll", RootPath + @"\imageres.dll.BACKUP", true);
                        }
                        TakeOwn(RootPath + @"\imageres.dll");
                        foreach (uint image in imageID)
                        {
                            msoobe = SourceFile(new string[image]);
                            byte[] img = ToJpeg(new Bitmap(SourceFile(new string[image])), ImageFormat.Jpeg);
                            byte[] res = new byte[img.Length];
                            Buffer.BlockCopy(img, 0, res, 0, res.Length);
                            IntPtr ipTarget = BeginUpdateResource(RootPath + @"\imageres.dll", false);
                            if (UpdateResource(ipTarget, "IMAGE", image, Culture(), res, (uint)res.Length))
                            {
                                EndUpdateResource(ipTarget, false);
                            }
                        }
                        if (File.Exists(RootPath + @"\oobe\msoobe.jpg") && File.Exists(msoobe))
                        {
                            TakeOwn(RootPath + @"\oobe\msoobe.jpg");
                            if (!File.Exists(RootPath + @"\oobe\msoobe.BACKUP.jpg"))
                            {
                                File.Move(RootPath + @"\oobe\msoobe.jpg", RootPath + @"\oobe\msoobe.BACKUP.jpg");
                            }
                            if (File.Exists(msoobe))
                            {
                                SaveImage(msoobe, RootPath + @"\oobe\msoobe.jpg", ImageFormat.Jpeg, true);
                            }
                        }
                    }
                }
            }
            catch
            {
            }
        }

        //Get UI culture
        public static uint Culture()
        {
             return (uint)CultureInfo.GetCultureInfoByIetfLanguageTag(CultureInfo.InstalledUICulture.Name).LCID;
        }

        //Check if OS is 6.0
        public static bool IsOS()
        {
           return Environment.OSVersion.Version.Major == 6 & Environment.OSVersion.Version.Minor == 0 ? true : false;
        }

        //Get the images to replace in imageres.dll 
        public static int[,] imageID = new int[,] { 
            { 5031 },
            { 5032 },
            { 5033 },
            { 5034 },
            { 5035 },
            { 5036 },
            { 5037 },
            { 5038 },
            { 5039 },
            { 5040 },
            { 5041 },
            { 5042 },
            { 5043 }
        };

        //Get the image location from commandline argument
        public static string SourceFile(string[] images)
        {
            foreach (string str in Environment.GetCommandLineArgs())
            {
                if (str.ToUpper().Contains("/I="))
                {
                    images = str.Split(new string[] { "/I=" }, StringSplitOptions.None);
                    break;
                }
            }            
            return images[1];  
        }

        //Convert and save image to JPEG from Memory stream
        public static void SaveImage(string input, string output, ImageFormat format, bool overwrite)
        {
            MemoryStream ms = new MemoryStream(File.ReadAllBytes(input));
            Image img = Image.FromStream(ms);
            if (overwrite && File.Exists(output))
            {
                File.Delete(output);
            }
            img.Save(output, format);
            ms.Close();
        }  
        
        //Convert image to JPEG in Memory stream
        public static byte[] ToJpeg(Image image, ImageFormat format)
        {
            MemoryStream ms = new MemoryStream();
            image.Save(ms, format);
            byte[] img = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(img, 0, (int)ms.Length);
            ms.Close();
            return img;
        }

        //Take ownership of imageres.dll
        public static void TakeOwn(string file)
        {
            FileSecurity own = File.GetAccessControl(file);
            SecurityIdentifier Everyone = new SecurityIdentifier(WellKnownSidType.WorldSid, null);
            own.AddAccessRule(new FileSystemAccessRule(Everyone, FileSystemRights.FullControl, AccessControlType.Allow));
            File.SetAccessControl(file, own);
        }
    }
}

Usage example in oobe.cmd:

Code:

"%~dp0imageres.exe" /I="My image location"
ie: "%~dp0imageres.exe" /I="%windir%\Setup\scripts\Wallpaper.jpg"
ie: "%~dp0imageres.exe" /I="%windir%\Setup\scripts\Wallpaper.bmp"
ie: "%~dp0imageres.exe" /I="%windir%\Setup\scripts\Wallpaper.png"

Download source code:

Spoiler

Code:

http://www.datafilehost.com/d/6dd36806

Download Compiled .exe:

Spoiler

Code:

http://www.datafilehost.com/d/67b1d057