Hello till, thanks for the fast reply.
I just saw that a lot of sourcecode packages are getting compiled during the setup script and thought "hey I do already have those application! Why compiling them again?". Anyway: Is it possible to use the system apache etc for ISPConfig?
In case of a security leak in apache, php5 etc it would be easier to replace those applications if they were managed by the system's package system (such as apt).