This is because nVIDIA chipset supports SATA Hot Swap function, you can see the SATA Device in the "safely remove hardware" wizard under Windows XP. Please note that Windows will NOT allow you to remove a boot drive / system volume within this Windows utility.
GA-7ZMM doesn't use AC' 97 audio sound; thus, please set your AMR card to be "Primary." But please note that some AMR cards cannot be set to be "Primary" or "Secondary." Therefore please see carefully when you buy the AMR card.