some of this does not make sense...
You say C is a rescue disk---do you mean CD?
Does the harddrive have only one partition (D)?
We need to know the basic configuration of your system, including the number and size of the drives (partitions)
When you boot from a Linux installation CD, you have to have empty (unpartitioned) space on a harddrive--or you will neve get to first base.
More details---more help..