1. you have to enable base page access, see your manual how to do it, from memory (and I could be wrong) it's "c:bootloader commandline allowbasepageaccess" in your startup-sequence (without the ""s obviously)
2. Use the latest ata3.driver, that's 7.1 I think, ask elbox to send it to you if you don't have it already. Run it at some point in your startup-sequence as "c:ata3.driver quiet" - I'm not sure about the "quiet" switch, it might not be needed any more.
3. To access your cds in the second channel you can just use allegro cdfs and your dosdrivers from 3.x (ie cd0, cd1), adjust the paths in them and put them in devs:dosdrivers of your OS4 instalation.
That's how it works for me. Except that I have to manually set the hd in nosplit mode that is....weird bug this one....!
