For explanation on installation please refer to chapter 4-1-4 of the manual and look under section: "Configuring SATA Hard Drives - Intel ICH8RSouthbridge", and you can click here to download Intel ICH8RSATA RAID manual.
nVIDIA announced a new VGA technology, SLI - Scalable Link Interface. The new tech. is only available for nVIDIA PCI-E VGA card. Based on Intel chipset specification, this MB does not provide PCI-E slot but PCI-X slot. Thus, we are sorry you can't use the VGA card with SLI on this MB.