Well I'm now once again at installation starting point because Ubuntu's integration with on Hyper-V either works or well... just doesn't work stable enough at the moment. So I'm switching to CentOS because MS certified its big brother RHEL 5, I hope to be safe there. Sad, because I'm really more used to Debian.
I am now a bit confused with Moodle 2 Setup now on CentOS 5 because it complains about the moodledata folder /var/moodledata I wanted to set. It's owned by the user apache (chown -R apache:apache) and even was set to 777. The folder absolutely exists but the setup complains it can't create it - WTH?!
Data directory ({$a->dataroot}) cannot be created by the installer.