I suppose you could have a Cyberstorm with 128 on it, three updated FastlaneZ3 cards with 256 on each, and a DKB3128 card with another 128 on it.
I'd love to do that just for kicks on my A4000T but:
1) I don't know if 3 Fastlane cards could get on with each other.
2) All my Zorro slots would be used up because I already have a DKB3128 board and a Picasso IV.
3) Finding 3 of those updated Fastlane cards will be impossible. I bet there are very few members here who have even one of those, and if they do they won't sell it for less than £300