So I guess I shall stick to those 5 Z2 boards. At this moment that A2000 runs with a X-Surf, CV64/3D and a Buddha Flash, three cards that come out of my dead A1200 with Z4 board. I also connected my 20 Gb harddrive and it reall works with OS 3.9. The only thing is that my A1200 had 2 Mb chip and 96 Mb fast. This A2000 has got 1 Mb chip and 2 Mb fast and that's not much to run OS 3.9 ... so I got myself a Nexus scsi card with 4 Mb Ram on Ebay (Germany) for 25 euro including porto ... hope that will help ...
Actually I still need to send the money tomorrow and hope to get it end next week ...