Hope this helps some one...
Last night I have installed Ubuntu 8.10 server from :
and followed up every instruction and when I tried to install ISPConfig 2.2.29 from http://www.ispconfig.org/manual_installation.htm
I encountered problems couple of times as it says chmod cannot access ./install.php
what I did was while generating certificates I was just entering . for all values and it fails then I read in the forums to unzip tar file in /var I also did that but no success then FINALLY
I did run the install from /root/ispconfig_install/ and filled almost every value for certificate generation and then BINGO !
All set and running
Thanks falco ! and other members for such a nice tutorial, and other posts on this forums.