The only way you can create, delete, resize or merge existing partitions,
and not harm your existing Windows installation, is to purchase and use
a third-party partitioning program such as Partition Magic 8. http://www.symantec.com/partitionmagic/
The alternative is to perform a "clean install" of Windows XP:
How to Partition and Format a Hard Disk in Windows XP http://support.microsoft.com/default.aspx?...313348&Produc.
Either way, you can't do it with built-in Windows functions. Unfortunately,
no version of Windows provides any way of changing the existing partition
structure of the drive nondestructively.
Whatever software you use, make sure you have a good backup before
beginning. Although there's no reason to expect a problem, things *can* go