I tried copying, but got the cyclic redundancy check again.
Then, I attempted to open assets0.pk3 with Winzip and WinRAR (both the most recent versions--9.0 SR-1 for Winzip and 3.42 for WinRAR). According to WinRAR, assets0 has no files in it. Winzip says:
"Error [E:\GAMEDATA\base\assets0.pk3]: unrecoverable zip file read error."
So, just how badly am I screwed?
Ah, yes, the lightsaber. The weapon of the Jedi Knights, those guardians of peace and justice. Has anyone noticed that guardians of peace and justice in sci-fi and fantasy tend to wield BLADES of DEATH?