Hi,
What is the error message you received after running Maven and/or Ant? The "ant fresh_install" command should create these directories for you, but it's possible that it errored out if it doesn't have permissions to create the directories.
Basically, we'd need more information about which step of the installation process threw an error & what that error was.
Once you locate the error message, if you cannot figure out the solution, feel free to send it to this mailing list and someone here can try to help.
Tim