Vista 32 refers to the 32 bit version of Vista. Vista 64 refers to the 64 bit version of Vista. The type of drivers you are using won't vary from the different feature set versions of Windows such as Ultimate, Home Premium, etc. But it is very important to know if you are using the 32 bit or 64 bit version.
Also, you shouldn't download the chipset drivers from Intel. You should download them from Sager or use the drivers that came on the CD with the computer. The manufacturer's chipset drivers are generic and often won't work properly with specific OEM systems. The same goes for all your drivers.