Has anyone ever fitted MPRO 6868 mainboard be fitted to a 6889 ?

Has anyone tried 6889/6868 dual setup with decent slokets ?

Has anyone tried PCI IDE Raid cards in 6868/6889? I read somehwere IBM
does not support this. But I have to confirm I can use BIG drives and
raid via Promise/HighPoint PCI133 Controller.

I can get hold of cheap 6889's and 6868 MBs.

I am considering a cheap dual setup, and have will either go this way
or dual duron route.

Thanks in advance for any help/insight/experiences provided.