Unpack the downloaded file in an appropriate directory by tar xvfz recog-client*.tgz.
Move into the created recog directory and type make.
Set the JAVA_HOME environmental variable to the path
where you installed the JDK/JRE package
(e.g. setenv JAVA_HOME /usr/java/jre1.5.0).
Alternatively, you can directly specify the JAVA_HOME variable
in the recog.sh script.
Invoke the RECOG client by ./recog.sh
(which creates RECOG folder in your home directory).