Repartitioning disks to change the partition map (to make multiple partitions or merge multiple partitions into a larger single partition) requires the use of partitioning software. Some operating systems include rudimentary partitioning capabilities, but generally speaking there are more robust and capable solutions available from third parties.
While Micronet does not endorse or provide support for any specific solution, a list of available partitioning software solutions is available here: http://en.wikipedia.org/wiki/List_of_disk_partitioning_software