diff --git a/direct/src/plugin/fileSpec.cxx b/direct/src/plugin/fileSpec.cxx
index c23db1674f..3d28850989 100755
--- a/direct/src/plugin/fileSpec.cxx
+++ b/direct/src/plugin/fileSpec.cxx
@@ -44,7 +44,7 @@ FileSpec::
 FileSpec() {
   _size = 0;
   _timestamp = 0;
-  memset(_hash, 0, sizeof(_hash));
+  memset(_hash, 0, hash_size);
   _got_hash = false;
   _actual_file = NULL;
 }
@@ -61,7 +61,7 @@ FileSpec(const FileSpec &copy) :
   _timestamp(copy._timestamp),
   _got_hash(copy._got_hash)
 {
-  memcpy(_hash, copy._hash, sizeof(_hash));
+  memcpy(_hash, copy._hash, hash_size);
   _actual_file = NULL;
 }
 
@@ -74,8 +74,8 @@ void FileSpec::
 operator = (const FileSpec &copy) {
   _filename = copy._filename;
   _size = copy._size;
-  _timestamp = copy._size;
-  memcpy(_hash, copy._hash, sizeof(_hash));
+  _timestamp = copy._timestamp;
+  memcpy(_hash, copy._hash, hash_size);
   _got_hash = copy._got_hash;
 }
 
@@ -260,7 +260,7 @@ check_hash(const string &pathname) const {
 ////////////////////////////////////////////////////////////////////
 bool FileSpec::
 read_hash(const string &pathname) {
-  memset(_hash, 0, sizeof(_hash));
+  memset(_hash, 0, hash_size);
 
   ifstream stream(pathname.c_str(), ios::in | ios::binary);
   if (!stream) {
diff --git a/direct/src/plugin/p3dMultifileReader.cxx b/direct/src/plugin/p3dMultifileReader.cxx
index 826d813833..6c03c40338 100644
--- a/direct/src/plugin/p3dMultifileReader.cxx
+++ b/direct/src/plugin/p3dMultifileReader.cxx
@@ -19,16 +19,8 @@
 #include <time.h>
 
 #ifdef _WIN32
-#include <sys/utime.h>
 #include <direct.h>
 #include <io.h>
-#define stat _stat
-#define utime _utime
-#define utimbuf _utimbuf
-
-#else
-#include <utime.h>
-
 #endif
 
 // This sequence of bytes begins each Multifile to identify it as a
@@ -103,7 +95,8 @@ extract_all(const string &to_dir, P3DPackage *package,
   Subfiles::iterator si;
   for (si = _subfiles.begin(); si != _subfiles.end(); ++si) {
     const Subfile &s = (*si);
-    if (package != NULL && !package->is_extractable(s._filename)) {
+    FileSpec file;
+    if (package != NULL && !package->is_extractable(file, s._filename)) {
       continue;
     }
 
@@ -121,15 +114,16 @@ extract_all(const string &to_dir, P3DPackage *package,
     if (!extract_subfile(out, s)) {
       return false;
     }
-
-    // Set the timestamp according to the multifile.
     out.close();
-    utimbuf utb;
-    utb.actime = time(NULL);
-    utb.modtime = s._timestamp;
-    utime(output_pathname.c_str(), &utb);
 
-    // Be sure to execute permissions on the file, in case it's a
+    // Check that the file was extracted correctly (and also set the
+    // correct timestamp).
+    if (!file.full_verify(to_dir)) {
+      nout << "After extracting, " << s._filename << " is still incorrect.\n";
+      return false;
+    }
+
+    // Be sure to set execute permissions on the file, in case it's a
     // program or something.
     chmod(output_pathname.c_str(), 0555);
 
diff --git a/direct/src/plugin/p3dPackage.cxx b/direct/src/plugin/p3dPackage.cxx
index 3124a30c0c..a580a36b18 100755
--- a/direct/src/plugin/p3dPackage.cxx
+++ b/direct/src/plugin/p3dPackage.cxx
@@ -810,6 +810,10 @@ build_install_plans(TiXmlDocument *doc) {
             (this, new_file, source_file, target_file);
           plan.push_back(step);
         }
+
+        // Unpack the uncompressed archive.
+        step = new InstallStepUnpackArchive(this, _unpack_size);
+        plan.push_back(step);
       }
     }
   }
@@ -1052,13 +1056,15 @@ start_download(P3DPackage::DownloadType dtype, const string &urlbase,
 //     Function: P3DPackage::is_extractable
 //       Access: Private
 //  Description: Returns true if the name file is on the extract list,
-//               false otherwise.
+//               false otherwise.  If true, fills in the FileSpec with
+//               the file's information.
 ////////////////////////////////////////////////////////////////////
 bool P3DPackage::
-is_extractable(const string &filename) const {
+is_extractable(FileSpec &file, const string &filename) const {
   Extracts::const_iterator ei;
   for (ei = _extracts.begin(); ei != _extracts.end(); ++ei) {
     if ((*ei).get_filename() == filename) {
+      file = (*ei);
       return true;
     }
   }
diff --git a/direct/src/plugin/p3dPackage.h b/direct/src/plugin/p3dPackage.h
index 88610ede48..359d5bf926 100755
--- a/direct/src/plugin/p3dPackage.h
+++ b/direct/src/plugin/p3dPackage.h
@@ -207,7 +207,7 @@ private:
   Download *start_download(DownloadType dtype, const string &urlbase, 
                            const string &pathname, const FileSpec &file_spec);
 
-  bool is_extractable(const string &filename) const;
+  bool is_extractable(FileSpec &file, const string &filename) const;
 
 private:
   P3DHost *_host;