diff --git a/INSTALL b/INSTALL
index 96c707e..e89bd8e 100644
--- a/INSTALL
+++ b/INSTALL
@@ -40,38 +40,33 @@ If it doesn't run, i'm afraid you've got to compile the code (See section B).
 #                         B. COMPILE FASTQTL ON LINUX                                      #
 ############################################################################################
 
-(B.1) INSTALL MATH R LIBRARY
-	(1) Download R source code: 		wget http://cran.r-project.org/src/base/R-3/R-3.2.0.tar.gz
-	(2) Unzip R source code: 			tar xzvf R-3.2.0.tar.gz
-	(3) Go to R source code folder: 	cd R-3.2.0
-	(4) Configure Makefile: 			./configure
-	(5) Go to R math library folder: 	cd src/nmath/standalone
-	(6) Compile the code: 				make
-	(7) Go 2 folder backward:			cd ../..
-	(8) Save the current path:			RMATH=$(pwd)
-	
+(B.1) INSTALL R development version
+	(1) Install Rmath header files
+	On Debian/Ubunutu, just run:		`sudo apt-get install r-base-dev`
+	(2) Find the Rmath.h file 						`find /usr/ -iname Rmath.h`
+
 (B.2.1) INSTALL BOOST (if not already installer, OPTION1: MANUALLY)
-	(1) Download BOOST:					http://sourceforge.net/projects/boost/files/boost/1.58.0/boost_1_58_0.tar.gz/download
-	(2) Unzip the package:				tar xzvf boost_1_58_0.tar.gz
-	(3) Go in the folder:				cd boost_1_58_0
-	(4) Install required packages:		./bootstrap.sh --prefix=/home/olivier/Desktop/myInstall --with-libraries=iostreams,program_options
+	(1) Download BOOST:					`http://sourceforge.net/projects/boost/files/boost/1.58.0/boost_1_58_0.tar.gz/download`
+	(2) Unzip the package:				`tar xzvf boost_1_58_0.tar.gz`
+	(3) Go in the folder:				`cd boost_1_58_0`
+	(4) Install required packages:		`./bootstrap.sh --prefix=/home/olivier/Desktop/myInstall --with-libraries=iostreams,program_options`
 	
 (B.2.2) INSTALL BOOST (if not already installer, OPTION2: AUTOMATICALLY)
 	Many Linux distribution have BOOST package already built.
-	On Debian/Ubunutu, just run:		sudo apt-get install libboost-dev
-	On Redhat/CentOS, just run:			yum install boost-devel
+	On Debian/Ubunutu, just run:		`sudo apt-get install libboost-dev`
+	On Redhat/CentOS, just run:			`yum install boost-devel`
 	
-(B.3) INSTALL GSL (if not already installed)
+(B.3) INSTALL GSL 1.16 (if not already installed)
 	Most Linux distribution have GSL package already built.
-	On Debian/Ubunutu, just run:		sudo apt-get install libgsl0-dev
-	On Redhat/CentOS, just run:			yum install gsl-devel
+	On Debian/Ubunutu, just run:		`sudo apt-get install libgsl0-dev`
+	On Redhat/CentOS, just run:			`yum install gsl-devel`
 	
 	
 (B.4) COMPILE FASTQTL
-	(1) Go to the fastqtl folder:		cd FastQTL-2.165
-	(2) Compile the code running:		make cleanall && make
-		This later step needs the RMATH variable in A.1.8 to be defined.
-		This can be specified here by:	make RMATH=/my/path/to/r/src
+	(1) Go to the fastqtl folder:		`cd FastQTL-2.165`
+	(2) Compile the code running:		`make cleanall && make`
+		This later step needs the Rmath library see (B.1) from R and the `obj\` subfolder to be present.
+		This can be specified here by:	`mkdir obj && make RMATH=/usr/share/R/ LIB_MATH='-lRmath -I/usr/share/R/include/Rmath.h'`
 		
 ############################################################################################
 #                         C. RUN FASTQTL ON MACOS                                          #