I know this isn't the answer you're looking for, but JUST DON'T! There is a solid reason for all the Vista hating.
Anyhow ..
Windows Vista Home Basic
- 800-megahertz (MHz) 32-bit (x86) processor or 800-MHz 64-bit (x64) processor.
- 512 megabytes (MB) of system memory. ...
- DirectX 9-class graphics card.
- 32 MB of graphics memory.
- 20-gigabyte (GB) hard disk that has 15 GB of free hard disk space.
- Internal or external DVD drive.
- Internet access capability.