A list of recommend steps to finalize the aTV Flash installation can be found below.
After installing aTV Flash with a USB flash drive, extra plugins can be installed through the Maintenance --> Manage Plugins menu. To install a plugin simply highlight it and press the select button. The latest version will be downloaded and installed automatically.
Running the Smart Installer will enable a number of additional features including the USB storage, DVD playback and network streaming.
Navigate to the Maintenance --> Manage Plugins menu.
Ensure the nitoTV item appears as 'Installed'.
Navigate to the Maintenance --> Settings menu.
Select nito Smart Installer.
The process will automatically download and install all required files. (Note: the download will take a few minutes to complete)
You will be prompted to restart the Apple TV when complete.