from one end.(host1)
route add -host 10.8.0.238 gw nb-namran
..
and the other end(host2).
route add -host 192.168.88.19 gw nb-namran
and at nb-namran
echo “1” > /proc/sys/net/ipv4/ip_forward
.. should
then.
can ping host1 from host2 and vice versa.

Thanks for installing CentOS guide
It is very good artical, but it didn’t contain the information about how to install CentOS 5.3 on Windows OS like win 7 if it is already installed it.
thanks