MSI Live Update downloaded the latest BIOS for the K8N Neo4 Platinum and flashed it, no problem. The SI RAID stuff doesn't appear in the BIOS setup.
The weird thing is it gained a setting* for two floppy drives but even with two drives connected and the drive B: setting set and saved for 5.25" 1.2M, it will not keep that setting. (I have some old software on 1.2M disks I want to save.)
Does the nVidia nForce 4 Ultra chipset support two floppy drives or not? I verified it is the Ultra chipset by removing the heatsink and re-doing the white goo properly.
*It also un-hid all the CoreCell stuff and other things hidden in the OEM BIOS.