ispCP and CentOS = this_sucks

[obey]

i had some serious errors with the install instructions under docs/CentOS/INSTALL
first, the url courier should be downloaded from isn't existent.
then... centOS handles all apache files under /etc/httpd. the created tmp files are under /etc/apache2 which is debian-style.
third.. the "chkconfig --levels 3 6 ispcp_daemon on && chkconfig --levels 3 6 ispcp_network on" command is wrong syntax and not supported by ispcp_daemon...

it seems there is a lot of work to do....

nevertheless i managed to set it up. but if i try to log into the controlpanel it won't go to the start screen. all i get is the login-screen again. the strange thing about this, is that the session for the admin users exists (if i try to log in again it says: duplicate entry for... so the session is written to the db)
and the login-notification-mail is sent. so...it seems everything works fine except the gui.

any suggestions?
my customer is getting tired and angry for having a sysadmin work so long on a simple control panel installation and asks me already for another cp...

thx in advance
andy