diff --git a/P8Coder/CoderForm.cs b/P8Coder/CoderForm.cs
index ed85ab2..a476632 100644
--- a/P8Coder/CoderForm.cs
+++ b/P8Coder/CoderForm.cs
@@ -1,23 +1,14 @@
 using System;
-using System.Collections;
 using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
 using System.Diagnostics;
 using System.Drawing;
 using System.IO;
-using System.Linq;
-using System.Resources;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 
 using P8Coder.Core;
 using P8Coder.Utils;
-using P8Coder.Controls;
 using System.Runtime.InteropServices;
 using System.Threading;
-using System.Drawing.Drawing2D;
 
 namespace P8Coder
 {
@@ -33,9 +24,6 @@ public partial class CoderForm : Form
         private string title = "P8Coder";
         private Dictionary<string, Pico8ApiHelp> pico8help;
 
-        //private Process pico8Process;
-        //private IntPtr pico8Handle;
-
         private SpritesheetForm spritesheetForm;
         private MapForm mapForm;
 
@@ -257,7 +245,8 @@ private void updateProject()
             if (currentProject.CartFilename != cartInput.Text)
             {
                 currentProject.CartFilename = cartInput.Text;
-                currentProject.Cart.OnChangeCallback = new Action<Cartridge>(reloadCartridge);
+                if (currentProject.Cart == null) MessageBox.Show("Failed to load the cartridge!", "Sorry", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                else currentProject.Cart.OnChangeCallback = new Action<Cartridge>(reloadCartridge);
             }
             saveBtn.Enabled = true;
         }
diff --git a/P8Coder/Core/Cartridge.cs b/P8Coder/Core/Cartridge.cs
index e0b0e49..c9753be 100644
--- a/P8Coder/Core/Cartridge.cs
+++ b/P8Coder/Core/Cartridge.cs
@@ -73,33 +73,33 @@ public void Load()
 
         private void setupFromText(string text)
         {
-            char[] charsToTrim = { '\r', '\n', ' ' };
-
             rawText = text.Replace("\r", "");
-            string[] sections = Regex.Split(rawText, @"__(?:lua|gfx|gff|map|sfx|music)__\n");
-
-            if (sections.Length != 7) throw new Exception("Invalid file format! (1)");
 
-            string[] header = sections[0].Trim().Split('\n');
-            if (header.Length != 2) throw new Exception("Invalid file format! (2)");
+            string[] lines = rawText.Trim().Split('\n');
 
-            if (!readHeader(header[0].Trim())) throw new Exception("Invalid file format! (3)");
-            if (!readVersion(header[1].Trim())) throw new Exception("Invalid file format! (4)");
+            if (!readHeader(lines[0].Trim())) throw new Exception("Invalid file format! (1)");
+            if (!readVersion(lines[1].Trim())) throw new Exception("Invalid file format! (2)");
 
-            Lua = sections[1].Trim();
-            Gfx = sections[2].Replace("\n", "").Trim();
+            Lua = getSection("__lua__", rawText).Trim();
+            Gfx = getSection("__gfx__", rawText).Replace("\n", "").Trim();
 
-            if (Gfx.Length != 16384 /*16511*/) throw new Exception("Invalid file format! (5)");
+            if (Gfx.Length != 16384)
+                throw new Exception("Invalid file format! (3)");
 
-            Gff = sections[3].Trim();
-            Map = sections[4].Replace("\n", "").Trim();
-            Sfx = sections[5].Trim();
-            Music = sections[6].Trim();
+            Map = getSection("__map__", rawText).Replace("\n", "").Trim();
 
             createSprites();
             createMapSprite();
         }
 
+        private string getSection(string name, string data)
+        {
+            int start = data.IndexOf(name) + name.Length;
+            int end = data.IndexOf("__", start + name.Length);
+
+            return data.Substring(start, end - start).Trim();
+        }
+
         private void createSprites()
         {
             if (SpriteSheet == null)
@@ -189,10 +189,12 @@ private bool readVersion(string text)
         {
             //NOTE: version changes with every release of pico-8
             //      This means that we have no simple check to see if the file is compatible.
-            //if (text != "version 7") return false;
+
+            string[] parts = text.Split(' ');
+            if (parts.Length != 2) return false;
 
             int v = 0;
-            if (!int.TryParse(text.Substring(text.Length - 1, 1), out v)) return false;
+            if (!int.TryParse(parts[1], out v)) return false;
             Version = v;
             return true;
         }