If you receive:

Line <nnnn> of the Inf is corrupt or invalid. Setup cannot continue.
where <nnnn> is the number of the damaged or invalid line.

inspect your unattended answer file for:

\[OEM_ADS\]
Banner=""Windows 2000 Unattended Install Banner Message""

If they exist, comment them out:

;\[OEM_ADS\]
;Banner=""Windows 2000 Unattended Install Banner Message""