AHCI is a programming interface for SATA host controller. It provides new features, such as NCQ and hot plug, to increase performance. If you want to enable AHCI, please kindly set "SATA RAID/AHCI Mode" as AHCI in the BIOS. Then, install INTEL IAA driver in Windows XP/2000 O.S.
Please run Windows Update to install card reader driver; for the second unknown device is Intel Quick Resume driver, please disable it in BIOS setup\Power Management before Intel release the driver for Vista.