Increasing size of volume

I have a Windows 2000 server with a RAID 5 controller using 3 hard drives. The RAID configuation contains three volumes C drive with 6 Gbs, D drive with 128 Gbs and E drive with 5 Gbs. Is there a way to increase the size of the E drive using some of the free space on the D drive. I would like the E drive to be about 20 Gig.