diff --git a/INSTALL b/INSTALL
index 88ce327..44a1de3 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.0.5 - October 15, 1999
+Installing libpng version 1.0.5a - October 23, 1999
 
 Before installing libpng, you must first install zlib.  zlib
 can usually be found wherever you got libpng.  zlib can be
@@ -10,7 +10,7 @@
 version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.0.5" or "lpng103" and "zlib-1.1.3"
+might be called "libpng-1.0.5a" or "lpng103" and "zlib-1.1.3"
 or "zlib113") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -23,6 +23,8 @@
           *.c
           contrib
              gregbook
+             pngminus
+             pngsuite
           scripts
              makefile.*
           pngtest.png
@@ -49,8 +51,8 @@
  makefile.hpux     =>  HPUX (10.20 and 11.00) makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile
  makefile.sunos    =>  Sun makefile
- makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.5)
- makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc, creates libpng.so.2.1.0.5a)
+ makefile.linux    =>  Linux/ELF makefile (gcc, creates libpng.so.2.1.0.5a)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.mips     =>  MIPS makefile
  makefile.acorn    =>  Acorn makefile
@@ -93,12 +95,14 @@
 file and writes a "pngout.png" file that should be identical to it.
 Look for "9782 zero samples" in the output of the test.  For more
 confidence, you can run another test by typing "pngtest pngnow.png"
-and looking for "289 zero samples" in the output.
+and looking for "289 zero samples" in the output.  Also, you can
+run "pngtest -m *.png" in the "contrib/pngsuite" directory and compare
+your output with the result shown in contrib/pngsuite/README.
 
 Most of the makefiles will allow you to run "make install" to
 put the library in its final resting place (if you want to
 do that, run "make install" in the zlib directory first if necessary).
 
 Further information can be found in the README and libpng.txt
-files, in the individual makefiles, and in png.h, and the manual
-pages libpng.3 and png.5.
+files, in the individual makefiles, in png.h, and the manual pages
+libpng.3 and png.5.