Thanks, I'll try that later on and report back on how it worked. I'm fairly certain I got all the files though - I did knock all the .wav files for the arcade games down to zero kb's to fit it on the HDD, but I'm fairly certain all the files must have copied and that zeroing these has no real effect (otherwise I doubt the DVD/RW copy would've worked but I played that for about an hour with no trouble).
I'll see how I get on. Thanks again.
EDIT: Incidentally, I had a little app coded up that allows you to pick a file extension (such as wav), point it to a backed up game directory on your PC HDD and it'll automatically zero all the files in that directory with that extension. Saves a lot of time creating zero kb files and renaming each one or downsampling, or the problems of deleting them outright. Might post it later. 11kb.