diff --git a/debian-unstable-upstream/copyright b/debian-unstable-upstream/copyright
index 2abe00d65..799ff70a5 100644
--- a/debian-unstable-upstream/copyright
+++ b/debian-unstable-upstream/copyright
@@ -155,9 +155,11 @@ License: BSD (3 clause)
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-Files: plugins/zzogl-pg/opengl/ZeroGSShaders/* plugins/zzogl-pg/opengl/zpipe*
-Copyright: Unknown
+Files: plugins/zzogl-pg/opengl/zpipe.cpp
+Copyright: public domain
 
+Files: plugins/zzogl-pg/opengl/ZeroGSShaders/zerogsshaders*
+Copyright: Unknown
 
 The Debian packaging is:
 
diff --git a/debian-upstream/copyright b/debian-upstream/copyright
index 2abe00d65..799ff70a5 100644
--- a/debian-upstream/copyright
+++ b/debian-upstream/copyright
@@ -155,9 +155,11 @@ License: BSD (3 clause)
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
 
-Files: plugins/zzogl-pg/opengl/ZeroGSShaders/* plugins/zzogl-pg/opengl/zpipe*
-Copyright: Unknown
+Files: plugins/zzogl-pg/opengl/zpipe.cpp
+Copyright: public domain
 
+Files: plugins/zzogl-pg/opengl/ZeroGSShaders/zerogsshaders*
+Copyright: Unknown
 
 The Debian packaging is:
 
diff --git a/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.cpp b/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.cpp
index 23eef6e76..f4e946849 100644
--- a/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.cpp
+++ b/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.cpp
@@ -1,10 +1,9 @@
- /* ZeroGS KOSMOS
-  *
-  * Zerofrog's ZeroGS KOSMOS (c)2005-2008
-  *
-  * Zerofrog forgot to write any copyright notice after release the plugin into GPLv2
-  * If someone can contact him successfully to clarify this matter that would be great.
-  */
+/* The file is based of zpipe.c + minor rename and minor adaptation
+ *
+ * zpipe.c: example of proper use of zlib's inflate() and deflate()
+ * Not copyrighted -- provided to the public domain
+ * Version 1.4  11 December 2005  Mark Adler 
+ */
 
 // zpipe.cpp : Defines the entry point for the console application.
 //
diff --git a/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.h b/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.h
index b8c13d248..6562c7b5d 100644
--- a/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.h
+++ b/plugins/zzogl-pg/opengl/ZeroGSShaders/zpipe.h
@@ -1,10 +1,21 @@
- /* ZeroGS KOSMOS
-  *
-  * Zerofrog's ZeroGS KOSMOS (c)2005-2008
-  *
-  * Zerofrog forgot to write any copyright notice after release the plugin into GPLv2
-  * If someone can contact him successfully to clarify this matter that would be great.
-  */
+/*  ZZ Open GL graphics plugin
+ *  Copyright (c)2009-2010 zeydlitz@gmail.com, arcum42@gmail.com
+ *  Based on Zerofrog's ZeroGS KOSMOS (c)2005-2008
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
 
 #ifndef zpipe_h
 #define zpipe_h
diff --git a/plugins/zzogl-pg/opengl/zpipe.cpp b/plugins/zzogl-pg/opengl/zpipe.cpp
index 1c58fe5d1..45f80824d 100644
--- a/plugins/zzogl-pg/opengl/zpipe.cpp
+++ b/plugins/zzogl-pg/opengl/zpipe.cpp
@@ -1,13 +1,9 @@
- /* ZeroGS KOSMOS
-  *
-  * Zerofrog's ZeroGS KOSMOS (c)2005-2008
-  *
-  * Zerofrog forgot to write any copyright notice after release the plugin into GPLv2
-  * If someone can contact him successfully to clarify this matter that would be great.
-  */
-
-// zpipe.cpp : Defines the entry point for the console application.
-//
+/* The file is based of zpipe.c + minor rename and minor adaptation
+ *
+ * zpipe.c: example of proper use of zlib's inflate() and deflate()
+ * Not copyrighted -- provided to the public domain
+ * Version 1.4  11 December 2005  Mark Adler 
+ */
 
 #include <iostream>
 
@@ -18,14 +14,11 @@
 //#define ZLIB_WINAPI
 #include "zlib.h"
 
-int def(char *src, char *dst, int bytes_to_compress, int *bytes_after_compressed) ;
-int inf(char *src, char *dst, int bytes_to_decompress, int maximum_after_decompress) ;
-
 int def(char *src, char *dst, int bytes_to_compress, int *bytes_after_compressed)
 {
 	z_stream strm;
 
-	int ret;//, flush;
+	int ret;
 	unsigned have;
 
 	/* allocate deflate state */
@@ -63,7 +56,6 @@ int inf(char *src, char *dst, int bytes_to_decompress, int maximum_after_decompr
 	z_stream strm;
 
 	int ret;
-	//unsigned have;
 
 	/* allocate inflate state */
 	strm.zalloc = Z_NULL;
diff --git a/plugins/zzogl-pg/opengl/zpipe.h b/plugins/zzogl-pg/opengl/zpipe.h
index b8c13d248..6562c7b5d 100644
--- a/plugins/zzogl-pg/opengl/zpipe.h
+++ b/plugins/zzogl-pg/opengl/zpipe.h
@@ -1,10 +1,21 @@
- /* ZeroGS KOSMOS
-  *
-  * Zerofrog's ZeroGS KOSMOS (c)2005-2008
-  *
-  * Zerofrog forgot to write any copyright notice after release the plugin into GPLv2
-  * If someone can contact him successfully to clarify this matter that would be great.
-  */
+/*  ZZ Open GL graphics plugin
+ *  Copyright (c)2009-2010 zeydlitz@gmail.com, arcum42@gmail.com
+ *  Based on Zerofrog's ZeroGS KOSMOS (c)2005-2008
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
 
 #ifndef zpipe_h
 #define zpipe_h