diff --git a/trunk/README b/trunk/README
index d25607603..43db6d474 100644
--- a/trunk/README
+++ b/trunk/README
@@ -5,9 +5,9 @@
 The basic installation procedure must be done in the directory 
 which contains the extracted archive.
 
- --> Example : ./installParadiseo.sh
+ --> Example : source installParadiseo.sh
 
-Please try ./installParadiseo.sh --help  for further information
+Please try source installParadiseo.sh --help  for further information
 
 ==========================================================================================
                        DIRECTORY STRUCTURE
@@ -18,11 +18,13 @@ structure:
 .../                        Installation directory (specified with ./installParadiseo.sh)
    |
    +-- lib/
-   |	   | +-- /paradiseo-eo.tgz        paradiseo-eo archive
    |	   | +-- /libxml2-2.6.0.tar.bz2   LIBXML2 archive (required for ParadisEO)
    |	   | +-- /mpich2-1.0.3.tar.gz     MPICH2 archive (required for ParadisEO)
    |   
    |
+   +-- paradiseo-eo			  paradiseo-eo dir
+   |
+   |
    +-- paradiseo-mo                        paradiseo-mo dir 
    |
    |
@@ -46,7 +48,6 @@ you should have the following structure :
 .../                        Installation directory (specified with ./installParadiseo.sh)
    |
    +-- lib/
-   |	   | +-- /paradiseo-eo.tgz        paradiseo-eo archive
    |	   | +-- /libxml2-2.6.0.tar.bz2   LIBXML2 archive (required for ParadisEO)
    |	   | +-- /mpich2-1.0.3.tar.gz     MPICH2 archive (required for ParadisEO)
    |
diff --git a/trunk/paradiseo-mo/configure.in b/trunk/paradiseo-mo/configure.in
index eacdfe81f..7f365a782 100755
--- a/trunk/paradiseo-mo/configure.in
+++ b/trunk/paradiseo-mo/configure.in
@@ -1,6 +1,9 @@
 AC_INIT(configure.in)
 AM_INIT_AUTOMAKE(paradiseo-mo, 0.1)
 
+dnl Autoconf 2.6 or higher compatibility
+AC_DEFUN([AC_DATAROOTDIR_CHECKED])
+
 AC_ISC_POSIX
 AC_PROG_CXX
 AM_PROG_CC_STDC
diff --git a/trunk/paradiseo-moeo/configure.in b/trunk/paradiseo-moeo/configure.in
index 253a290ba..4b8d41f28 100755
--- a/trunk/paradiseo-moeo/configure.in
+++ b/trunk/paradiseo-moeo/configure.in
@@ -1,6 +1,9 @@
 AC_INIT(configure.in)
 AM_INIT_AUTOMAKE(moeo, 0.1)
 
+dnl Autoconf 2.6 or higher compatibility
+AC_DEFUN([AC_DATAROOTDIR_CHECKED])
+
 AC_ISC_POSIX
 AC_PROG_CXX
 AM_PROG_CC_STDC
diff --git a/trunk/paradiseo-peo/configure.in b/trunk/paradiseo-peo/configure.in
index 218f925e9..d34b86c96 100755
--- a/trunk/paradiseo-peo/configure.in
+++ b/trunk/paradiseo-peo/configure.in
@@ -7,6 +7,9 @@ AC_INIT(configure.in)
 AM_INIT_AUTOMAKE(paradisEO, 0.3)
 dnl AM_CONFIG_HEADER(config.h)
 
+dnl Autoconf 2.6 or higher compatibility
+AC_DEFUN([AC_DATAROOTDIR_CHECKED])
+
 AC_ISC_POSIX
 CXXFLAGS=""
 AC_SUBST(CXXFLAGS)