What you can do is just create a new partition of the remaining space and "mount" them in a specific folder on your 75GB Partition. That means the space on your partition would still remain at 75GB but as soon as you move into that folder you wold access the huge remaining space.

You can for example mount the new partition in c:\data and then install programs and move data to that directory. All files and subdirectories will be saved on the new partition.

See http://www.sevenforums.com/tutorials/11253-mount-drives-partitions-folder.html

What you can do is just create a new partition of the remaining space and "mount" them in a specific folder on your 75GB Partition. That means the space on your partition would still remain at 75GB but as soon as you move into that folder you wold access the huge remaining space.

You can for example mount the new partition in c:\data and then install programs and move data to that directory. All files and subdirectories will be saved on the new partition.

See http://www.sevenforums.com/tutorials/11253-mount-drives-partitions-folder.html