diff --git a/Program.cs b/Program.cs
index cc2890e..f9d49f4 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,12 +1,127 @@
-namespace TaikoNus3BankTemplateFix
+using System.Linq;
+using TaikoNus3BankTemplateFix.Properties;
+
+namespace TaikoNus3BankTemplateFix
 {
     internal class Program
     {
+        static int Similarity(byte[] buff, byte[] template)
+        {
+            if (buff.Length < template.Length) return 0;
+            int c = 0;
+            for (int i = 0; i < template.Length; i++) 
+            {
+                if (buff[i] == template[i]) c++;
+            }
+            return c * 100 / template.Length;
+        }
+
+        private static void Write32(byte[] b, int pos, uint x)
+        {
+            b[pos++] = (byte)(x & 0xFF); x >>= 8;
+            b[pos++] = (byte)(x & 0xFF); x >>= 8;
+            b[pos++] = (byte)(x & 0xFF); x >>= 8;
+            b[pos] = (byte)(x & 0xFF);
+        }
+
+        private static int Read32(byte[] b, int pos)
+        {
+            int x = 0;
+            x |= b[pos++];
+            x |= b[pos++] << 8;
+            x |= b[pos++] << 16;
+            x |= b[pos++] << 24;
+            return x;
+        }
+
+        private static void Write16(byte[] b, int pos, uint x)
+        {
+            b[pos++] = (byte)(x & 0xFF); x >>= 8;
+            b[pos++] = (byte)(x & 0xFF);
+        }
+
+        private static int Read16(byte[] b, int pos)
+        {
+            int x = 0;
+            x |= b[pos++];
+            x |= b[pos++] << 8;            
+            return x;
+        }
+
+        private static byte[] ReadBytes(byte[] b, int pos, int count)
+        {
+            var result = new byte[count];
+            for (int i = 0; i < count; i++)            
+                result[i] = b[pos++];            
+            return result;
+        }
+
+        private static void WriteBytes(byte[] b, int pos, byte[] src, int count)
+        {
+            for(int i=0;i<count;i++)            
+                b[pos++] = src[i];            
+        }
+
         static void Main(string[] args)
         {
-            
+            bool force = args.Contains("-f");
+            var new_args = args.Where(a => !a.StartsWith("-"));
 
+            foreach (var file in new_args) 
+            {                
+                Console.WriteLine(file);
 
+                try
+                {
+                    var input = File.ReadAllBytes(file);
+                    var new_similarity = Similarity(input, Resources.song_ABCDEF_nus3bank);
+
+                    if (new_similarity > 90)
+                        continue;
+
+                    if (Similarity(input, Resources.song_ABCDEF_nus3bank_old) < 90 && !force)
+                    {
+                        Console.WriteLine("This file doesn't resemble the old template. Use -f option to force it being converted to the new template (only if you know what you're doing).");
+                        continue;
+                    }
+
+                    // once we are sure that the nus3bank is in the old tempalte, we can convert it to the new one
+
+                    var idsp = input.Skip(Resources.song_ABCDEF_nus3bank_old.Length).ToArray();
+
+                    var length = Read32(input, 0x4);
+
+                    if (length != idsp.Length)
+                    {
+                        Console.WriteLine("Inconsistency fonud when getting IDSP length. Skipping the file...");
+                        continue;
+                    }
+
+                    var songName = ReadBytes(input, 0xAA, 6);
+
+                    var uniqId = Read16(input, 0xB4);
+
+                    int bb = Read32(input, 0xDDC);
+
+                    var header = Resources.song_ABCDEF_nus3bank.ToArray();
+
+                    Write32(header, 0x4, (uint)idsp.Length);
+                    WriteBytes(header, 0xAA, songName, 6);
+                    WriteBytes(header, 0x612, songName, 6);
+                    Write16(header, 0xB4, (uint)uniqId);
+                    Write32(header, 0x4C, (uint)idsp.Length);
+                    Write32(header, 0x628, (uint)idsp.Length);
+                    Write32(header, 0x74C, (uint)idsp.Length);
+                    Write32(header, 0x4, (uint)idsp.Length);
+                    Write32(header, 0x6C4, (uint)bb);
+                    File.WriteAllBytes(file, header.Concat(idsp).ToArray());
+                }
+                catch(Exception ex)
+                {
+                    Console.WriteLine("Error");
+                    Console.WriteLine(ex.Message);
+                }
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/Properties/PublishProfiles/FolderProfile.pubxml b/Properties/PublishProfiles/FolderProfile.pubxml
new file mode 100644
index 0000000..5032492
--- /dev/null
+++ b/Properties/PublishProfiles/FolderProfile.pubxml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net6.0\publish\win-x86\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net6.0</TargetFramework>
+    <RuntimeIdentifier>win-x86</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>true</PublishSingleFile>
+    <PublishReadyToRun>true</PublishReadyToRun>
+    <PublishTrimmed>true</PublishTrimmed>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/Properties/launchSettings.json b/Properties/launchSettings.json
new file mode 100644
index 0000000..b63f6b2
--- /dev/null
+++ b/Properties/launchSettings.json
@@ -0,0 +1,8 @@
+{
+  "profiles": {
+    "TaikoNus3BankTemplateFix": {
+      "commandName": "Project",
+      "commandLineArgs": "C:\\Users\\NotImpLife\\Desktop\\nus\\exports\\all9\\nus3banks\\song_abc.nus3bank C:\\Users\\NotImpLife\\Desktop\\nus\\exports\\all9\\nus3banks\\old.nus3bank"
+    }
+  }
+}
\ No newline at end of file
diff --git a/TaikoNus3BankTemplateFix.csproj b/TaikoNus3BankTemplateFix.csproj
index 74abf5c..ac4dd53 100644
--- a/TaikoNus3BankTemplateFix.csproj
+++ b/TaikoNus3BankTemplateFix.csproj
@@ -5,6 +5,23 @@
     <TargetFramework>net6.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <Title>Taiko Nus3Bank Template Fix</Title>
+    <Authors>NotImplementedLife</Authors>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Compile Update="Properties\Resources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
 </Project>