The drive tools on the Vista installation disk or the free Linux drive tool GParted will easily create any size partition on the drive. If the Disk Management tool you first right click on the drive when seen there to choose the create partition option. The MS page shows the following.
To create and format a partition (volume)
When you create partitions on a basic disk using Disk Management, the first three volumes you create will be formatted as primary partitions. Beginning with the fourth volume, each volume will be configured as a logical drive within an extended partition. For more information, see What are partitions and logical drives?
1. Open Computer Management by clicking the Start button , clicking Control Panel, clicking System and Maintenance, clicking Administrative Tools, and then double-clicking Computer Management. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
2. In the Navigation pane, under Storage, click Disk Management.
3. Right-click an unallocated region on your hard disk, and then click New Simple Volume.
4. In the New Simple Volume Wizard, click Next.
5. Type the size of the volume you want to create in megabytes (MB) or accept the maximum default size, and then click Next.
6. Accept the default drive letter or choose a different drive letter to identify the partition, and then click Next.
7. In the Format Partition dialog box, do one of the following:
• If you don't want to format the volume right now, click Do not format this volume, and then click Next.
• To format the volume with the default settings, click Next.
8. Review your choices, and then click Finish.
One quick guide for partitioning and formatting drives while booted with the Vista dvd is seen at Create New Partition Using The Vista DVD.