Update - just blasted 5 gigs on over Ethernet. - no problems at all, except the silly one at the very end - 0xffffffff in stage 10. FYI, that's with MSIE3.0 under NT4 SP4. (Still stuffed on the twin CPU box, though, but I can live with that)
Cheers, guys. It's my best toy ever, and there's some stiff competition for that title, not least the Mk I :)

Steve