Problem fixed...maybe not solved, but fixed....
Something was wrong with the Promise controller/bios. It was not working. I had re-flashed with updated 1016 bios and nothing changed. After much back & forth (you can imaging) and RMA activity, on a lark, I decided to re-flash. Don't know if it was significant, but, with the WinFlash, I flashed of the internet....which gets the code straight from Taiwan (I think).
On booting, the Promise controller scanned for devices, which it had stopped doing. Iwas able to set on a SATA drive up as a single array RAID. I then switched the Promise controller from RAID to IDE (and had to change drivers for RAID controller in Device mgr) and was able to bring drive up as IDE. I suspect that adding an add'l "IDE" SATA will add easily. Not sure what would have happenned on adding an additional RAID.
The Asus tech support does not all agree on direction for SATA on these chips. As I said earlier, some say you cannot have SATA on both chips. Others say you can have up to 2 on each(=4). I am pretty sure, from my most current experience, that you can have 4 non-RAID. I suspect that the tech support guys may have tried to have two separate RAIDs...maybe this does not work....anyway, I appear, for now, to be fixed.
Thanks for help......JOHN