Index: /AE/installer2/src/net/oni2/aeinstaller/AEInstaller.properties
===================================================================
--- /AE/installer2/src/net/oni2/aeinstaller/AEInstaller.properties	(revision 642)
+++ /AE/installer2/src/net/oni2/aeinstaller/AEInstaller.properties	(revision 643)
@@ -1,2 +1,2 @@
 appname=AE Installer 2
-appversion=0.98
+appversion=0.99
Index: /AE/installer2/src/net/oni2/aeinstaller/gui/MainWin.java
===================================================================
--- /AE/installer2/src/net/oni2/aeinstaller/gui/MainWin.java	(revision 642)
+++ /AE/installer2/src/net/oni2/aeinstaller/gui/MainWin.java	(revision 643)
@@ -525,7 +525,9 @@
 				}
 				if (depsLocalString.length() == 0)
-					depsLocalString = bundle.getString("installDependencies.none");
+					depsLocalString = bundle
+							.getString("installDependencies.none");
 				if (depsDownloadString.length() == 0)
-					depsDownloadString = bundle.getString("installDependencies.none");
+					depsDownloadString = bundle
+							.getString("installDependencies.none");
 
 				int res = JOptionPane.showConfirmDialog(this, String.format(
@@ -541,11 +543,28 @@
 				}
 			} else {
-				HashMap<Mod, HashSet<Mod>> conflicts = ModManager.getInstance()
+				HashMap<Mod, HashSet<Mod>> incompatibilities = ModManager.getInstance()
 						.checkIncompabitilites(mods);
-				if (conflicts.size() > 0) {
+				if (incompatibilities.size() > 0) {
 					installState = EInstallState.INCOMPATIBLE;
-					System.err.println("Incompatible mods: "
-							+ conflicts.toString());
-					// TODO: Message window with incompatibilities
+
+					String incompatString = "";
+					for (Mod m : incompatibilities.keySet()) {
+						if (incompatString.length() > 0)
+							incompatString += "\n";
+						incompatString += m.getName() + ": ";
+						String confMods = "";
+						for (Mod mConf : incompatibilities.get(m)) {
+							if (confMods.length() > 0)
+								confMods += ", ";
+							confMods += mConf.getName();
+						}
+						incompatString += confMods;
+					}
+
+					JOptionPane.showMessageDialog(this, String.format(
+							bundle.getString("installIncompatibilities.text"),
+							incompatString), bundle
+							.getString("installIncompatibilities.title"),
+							JOptionPane.ERROR_MESSAGE);
 					break;
 				} else {
Index: /AE/installer2/src/net/oni2/aeinstaller/localization/MainWin.properties
===================================================================
--- /AE/installer2/src/net/oni2/aeinstaller/localization/MainWin.properties	(revision 642)
+++ /AE/installer2/src/net/oni2/aeinstaller/localization/MainWin.properties	(revision 643)
@@ -59,4 +59,6 @@
 Size of files to be downloaded: %s.\n\nContinue?
 installDependencies.none=<None>
+installIncompatibilities.title=Incompatible mods
+installIncompatibilities.text=The following mods are incompatible:\n\n%s\n\nInstallation will be aborted.
 installDone.title=Installation done
 installDone.text=You can now play AE Oni.