The Install process for Vista should install fully functional AHCI driver(s) suited to the SATA ports on your mobo. However, once it is running OK under Vista, it would be a good idea to go to use the Driver Updating facility in Control Panel ... System ... Device Manager ... Disk Drives. Right-click on the HDD and choose Properties, then use the tabs and buttons to Update the Driver, and the system should go looking on the 'net - probably from Gateway or Microsoft - for the latest AHCI driver to match your mobo's SATA controllers. This same process - updating the drivers for all your devices - is often a good idea right after an OS Install, especially when you are installing an older OS whose CD is somewhat out of date. It can be surprising how many "devices" your system has - SATA and IDE ports, USB, IEEE1394, LAN, etc - and these are just the ones most people can think of.
By the way, many mobos come with a CD containing, among many things, a utility to install all the drivers customized for this mobo, once the OS is installed. However, many of those drivers are likely out of date - they were issued some years ago when the CD was made. So many people prefer NOT to use them, and have automatic updating find the most recent drivers from websites.