diff --git a/GUI/GarOperation.cs b/GUI/GarOperation.cs
index 71039629..c784f97a 100644
--- a/GUI/GarOperation.cs
+++ b/GUI/GarOperation.cs
@@ -55,7 +55,7 @@ namespace GARbro.GUI
         protected Stream CreateNewFile (string filename, bool create_path = false)
         {
             if (create_path)
-                filename = GameRes.ArchiveFormat.CreatePath (filename);
+                filename = GameRes.PhysicalFileSystem.CreatePath (filename);
             FileMode open_mode = FileMode.CreateNew;
             if (m_duplicate_action.ApplyToAll &&
                 m_duplicate_action.Action == ExistingFileAction.Overwrite)
diff --git a/GameRes/ArchiveFormat.cs b/GameRes/ArchiveFormat.cs
index 0ffd95d3..00a989b3 100644
--- a/GameRes/ArchiveFormat.cs
+++ b/GameRes/ArchiveFormat.cs
@@ -49,7 +49,7 @@ namespace GameRes
         public void Extract (ArcFile file, Entry entry)
         {
             using (var input = OpenEntry (file, entry))
-            using (var output = CreateFile (entry.Name))
+            using (var output = PhysicalFileSystem.CreateFile (entry.Name))
                 input.CopyTo (output);
         }
 
@@ -70,40 +70,6 @@ namespace GameRes
             return ImageFormatDecoder.Create (input);
         }
 
-        /// <summary>
-        /// Create file corresponding to <paramref name="entry"/> in current directory and open it
-        /// for writing. Overwrites existing file, if any.
-        /// </summary>
-        static public Stream CreateFile (string filename)
-        {
-            filename = CreatePath (filename);
-            return File.Create (filename);
-        }
-
-        static public string CreatePath (string filename)
-        {
-            string dir = Path.GetDirectoryName (filename);
-            if (!string.IsNullOrEmpty (dir)) // check for malformed filenames
-            {
-                string root = Path.GetPathRoot (dir);
-                if (!string.IsNullOrEmpty (root))
-                {
-                    dir = dir.Substring (root.Length); // strip root
-                }
-                string cwd = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar;
-                dir = Path.GetFullPath (dir);
-                filename = Path.GetFileName (filename);
-                // check whether filename would reside within current directory
-                if (dir.StartsWith (cwd, StringComparison.OrdinalIgnoreCase))
-                {
-                    // path looks legit, create it
-                    Directory.CreateDirectory (dir);
-                    filename = Path.Combine (dir, filename);
-                }
-            }
-            return filename;
-        }
-
         /// <summary>
         /// Create resource within stream <paramref name="file"/> containing entries from the
         /// supplied <paramref name="list"/> and applying necessary <paramref name="options"/>.
diff --git a/GameRes/FileSystem.cs b/GameRes/FileSystem.cs
index ae3fee45..534dc61c 100644
--- a/GameRes/FileSystem.cs
+++ b/GameRes/FileSystem.cs
@@ -138,7 +138,7 @@ namespace GameRes
             var info = new DirectoryInfo (CurrentDirectory);
             foreach (var subdir in info.EnumerateDirectories())
             {
-                if (0 != (subdir.Attributes & (FileAttributes.Hidden | FileAttributes.System)))
+                if (0 != (subdir.Attributes & FileAttributes.System))
                     continue;
                 yield return new SubDirEntry (subdir.FullName);
             }
@@ -158,7 +158,7 @@ namespace GameRes
             var info = new DirectoryInfo (path);
             foreach (var file in info.EnumerateFiles (pattern))
             {
-                if (0 != (file.Attributes & (FileAttributes.Hidden | FileAttributes.System)))
+                if (0 != (file.Attributes & FileAttributes.System))
                     continue;
                 yield return EntryFromFileInfo (file);
             }
@@ -169,7 +169,7 @@ namespace GameRes
             var info = new DirectoryInfo (CurrentDirectory);
             foreach (var file in info.EnumerateFiles ("*", SearchOption.AllDirectories))
             {
-                if (0 != (file.Attributes & (FileAttributes.Hidden | FileAttributes.System)))
+                if (0 != (file.Attributes & FileAttributes.System))
                     continue;
                 yield return EntryFromFileInfo (file);
             }
@@ -202,6 +202,43 @@ namespace GameRes
         {
             GC.SuppressFinalize (this);
         }
+
+        /// <summary>
+        /// Create file named <paramref name="filename"/> in current directory and open it
+        /// for writing. Overwrites existing file, if any.
+        /// </summary>
+        static public Stream CreateFile (string filename)
+        {
+            filename = CreatePath (filename);
+            return File.Create (filename);
+        }
+
+        /// <summary>
+        /// Create all directories that lead to <paramref name="filename"/>, if any.
+        /// </summary>
+        static public string CreatePath (string filename)
+        {
+            string dir = Path.GetDirectoryName (filename);
+            if (!string.IsNullOrEmpty (dir)) // check for malformed filenames
+            {
+                string root = Path.GetPathRoot (dir);
+                if (!string.IsNullOrEmpty (root))
+                {
+                    dir = dir.Substring (root.Length); // strip root
+                }
+                string cwd = Directory.GetCurrentDirectory() + Path.DirectorySeparatorChar;
+                dir = Path.GetFullPath (dir);
+                filename = Path.GetFileName (filename);
+                // check whether filename would reside within current directory
+                if (dir.StartsWith (cwd, StringComparison.OrdinalIgnoreCase))
+                {
+                    // path looks legit, create it
+                    Directory.CreateDirectory (dir);
+                    filename = Path.Combine (dir, filename);
+                }
+            }
+            return filename;
+        }
     }
 
     public abstract class ArchiveFileSystem : IFileSystem