diff --git a/ReleasePackageInstaller/AddReadOnlyFlag.xslt b/ReleasePackageInstaller/AddReadOnlyFlag.xslt
new file mode 100644
index 0000000..09dd4f3
--- /dev/null
+++ b/ReleasePackageInstaller/AddReadOnlyFlag.xslt
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="1.0"
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns="http://schemas.microsoft.com/wix/2006/wi"
+    xmlns:wix="http://schemas.microsoft.com/wix/2006/wi">
+
+    <xsl:template match="wix:File">
+        <xsl:copy>
+            <xsl:apply-templates select="@*" />
+            <xsl:attribute name="ReadOnly">
+                <xsl:text>yes</xsl:text>
+            </xsl:attribute>
+            <xsl:apply-templates select="*" />
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="*">
+        <xsl:copy>
+            <xsl:apply-templates select="@*" />
+            <xsl:apply-templates select="* | text()"/>
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="@* | text()">
+        <xsl:copy />
+    </xsl:template>
+
+    <xsl:template match="/">
+        <xsl:apply-templates />
+    </xsl:template>
+
+</xsl:stylesheet>
\ No newline at end of file
diff --git a/ReleasePackageInstaller/Product.wxs b/ReleasePackageInstaller/Product.wxs
index 18c823a..b22646a 100644
--- a/ReleasePackageInstaller/Product.wxs
+++ b/ReleasePackageInstaller/Product.wxs
@@ -31,9 +31,10 @@
       </Directory>
     </Directory>
 
+
     <DirectoryRef Id="AEROFOILPRODUCTDIR">
       <Component Id="Aerofoil.exe" Guid="*">
-        <File Id="Aerofoil.exe" Source="$(var.Aerofoil.TargetPath)" KeyPath="yes" Checksum="yes"/>
+        <File Id="Aerofoil.exe" Source="$(var.Aerofoil.TargetPath)" KeyPath="yes" Checksum="yes" />
       </Component>
       <Component Id="FreeType.dll" Guid="*">
         <File Id="FreeType.dll" Source="$(var.FreeType.TargetPath)" KeyPath="yes" Checksum="yes"/>
@@ -108,7 +109,7 @@
       </Component>
     </DirectoryRef>
 
-    <Feature Id="AerofoilApplication" Title="Glider PRO Game Data" Level="1" Display="expand">
+    <Feature Id="AerofoilApplication" Title="Glider PRO Game Data" Level="1" Display="expand" ConfigurableDirectory="AEROFOILPRODUCTDIR">
       <ComponentRef Id="Aerofoil.exe" />
       <ComponentRef Id="FreeType.dll" />
       <ComponentRef Id="GpApp.dll" />
@@ -140,7 +141,6 @@
       <Feature Id="HousePack1Feature" Title="Additional Houses" Level="1">
         <ComponentGroupRef Id="HousePack1ComponentGroup" />
       </Feature>
-
     </Feature>
 
     <WixVariable Id="WixUILicenseRtf" Value="$(var.ProjectDir)\LICENSE.rtf"/>
@@ -153,8 +153,6 @@
       <MergeRef Id="VCRedist" />
     </Feature>
 
-    <Property Id="WIXUI_INSTALLDIR" Value="AEROFOILPRODUCTDIR" />
-
     <UI>
       <UIRef Id="WixUI_Mondo" />
       <Publish Dialog="ExitDialog" Control="Finish" Event="DoAction" Value="LaunchApplication">WIXUI_EXITDIALOGOPTIONALCHECKBOX = 1 and NOT Installed</Publish>
diff --git a/ReleasePackageInstaller/ReleasePackageInstaller.wixproj b/ReleasePackageInstaller/ReleasePackageInstaller.wixproj
index 293178c..5d5fc24 100644
--- a/ReleasePackageInstaller/ReleasePackageInstaller.wixproj
+++ b/ReleasePackageInstaller/ReleasePackageInstaller.wixproj
@@ -188,6 +188,7 @@ PackagedDataDir=$(SolutionDir)\Packaged;
         <ComponentGroupName>DefaultHousesComponentGroup</ComponentGroupName>
         <AutogenerateGuids>true</AutogenerateGuids>
         <PreprocessorVariable>var.HousesDataDir</PreprocessorVariable>
+        <Transforms>AddReadOnlyFlag.xslt</Transforms>
       </HarvestDirectory>
       <HarvestDirectory Include="$(SolutionDir)\InstallerPackages\HousePack1">
         <DirectoryRefId>AEROFOILHOUSESDIR</DirectoryRefId>
@@ -197,6 +198,7 @@ PackagedDataDir=$(SolutionDir)\Packaged;
         <ComponentGroupName>HousePack1ComponentGroup</ComponentGroupName>
         <AutogenerateGuids>true</AutogenerateGuids>
         <PreprocessorVariable>var.HousesDataDir</PreprocessorVariable>
+        <Transforms>AddReadOnlyFlag.xslt</Transforms>
       </HarvestDirectory>
       <HarvestDirectory Include="$(SolutionDir)\InstallerPackages\LooseDocumentation">
         <DirectoryRefId>AEROFOILDOCUMENTATIONDIR</DirectoryRefId>