A145fw.tar !new! -
First, I should confirm what exactly they want. Are they trying to create a tar file from existing files, or modify the existing a145fw.tar? Also, the user might have meant "piece" as a typo for "file" or "package." Since the tar file exists, maybe they need instructions on creating another tar file or modifying this one.
If you cannot access the service menu to perform maintenance. System Hangs: a145fw.tar