Aider moi pour installer ns2

Bonjour,

je viens d'installer le NS2 v 2.29.3 sous ubuntu 7.10 aprés l'exécution de ./install,j'ai eu ce message

Please put /home/jihed/Bureau/ns/ns-allinone-2.29/bin:/home/jihed/Bureau/ns/ns-allinone-2.29/tcl8.4.11/unix:/home/jihed/Bureau/ns/ns-allinone-2.29/tk8.4.11/unix
into your PATH environment; so that you'll be able to run itm/tclsh/wish/xgraph.

IMPORTANT NOTICES:

(1) You MUST put /home/jihed/Bureau/ns/ns-allinone-2.29/otcl-1.11, /home/jihed/Bureau/ns/ns-allinone-2.29/lib,
into your LD_LIBRARY_PATH environment variable.
If it complains about X libraries, add path to your X libraries
into LD_LIBRARY_PATH.
If you are using csh, you can set it like:
setenv LD_LIBRARY_PATH <paths>
If you are using sh, you can set it like:
export LD_LIBRARY_PATH=<paths>

(2) You MUST put /home/jihed/Bureau/ns/ns-allinone-2.29/tcl8.4.11/library into your TCL_LIBRARY environmental
variable. Otherwise ns/nam will complain during startup.

(3) [OPTIONAL] To save disk space, you can now delete directories tcl8.4.11
and tk8.4.11. They are now installed under /home/jihed/Bureau/ns/ns-allinone-2.29/{bin,include,lib}

After these steps, you can now run the ns validation suite with
cd ns-2.29; ./validate

alors comment je peux regler ca?
de l'aide svp j'ai vraiment besoin de ca trop vite!!!!!!!!!!!!!!