I don't think "upgraded" is the right word. "Stuffed" might be more apt. Two hardcards, two floppies and a RAM expander? I'm surprised the PS didn't melt down (unless it too got upgraded) (I think the stock 2000HD only came with a single floppy)
This would have been a sweet power setup back in the day. And if you fill the ram expansion completely you could probably get a total of 9 megs in there!
(8m fast on the Supra + 1m chip on the motherboard)