Just in case you find yourself manually editing some of the Configuration files (which is rare, but still…), be very careful not to add any extra blank lines at the start or end of the files. For some very tricky reasons, this may cause your cookies to fail where needed in the app, and you won’t know why. See also: "Warning: Cannot modify header information"
Once your installation is done and basically works, there are still a few tricky things you should watch for:
On public / production servers, you’ll want to do the following for optimal security of your system:
/installfolder. This will prevent others from possibly overwriting your settings.