multiple ATI RADEON 7000 PCI (latest version)

I’ve sent a question to solve multidisplay output:

<multiple ATI RADEON 7000 PCI (last version)>
<Mon, 8 Nov 2004 18:37:50 +0100>

…but i didn’t get any answer. We have found it’s the same problem under
QNX6.3. We have bought 50 cards, which were well-tried, but these are a
little bit newer version. Perhaps the driver doesn’t support coexistence
more of these or coexistence with any other videocard (AGP or PCI).

Have you any experience to manage multidisplay output, using these or other