No, I'm not following either. What makes you think you have 'unallocated space'? What size is your hard drive? What size is your ME partition? If you run Fdisk, does it say there is any room to create further partitions? - and if so, how much? Remember, different processes use different definitions of what a gigabyte is - from 1,000,000,000 bytes to 1,073,741,824 (1024 cubed) bytes - so comparing figures from different sources can give apparent inconsistencies.
If you really do have unallocated space on the drive and you want to merge it with existing partition, you'll need something like Partition Magic to do this without starting from scratch (ie, windows does NOT have tools to merge partitions or add unallocated space to existing partition).