partitioning - Repartitioning to install Linux on an NTFS disk

[EDITED to clarify]
I have 2 physical disks, both NTFS. One has Windows installed and the second is just for data. I want to:

1. Resize the secondary NTFS disk leaving half of it unallocated.


2. Partition and format the newly unallocated part of the disk so it may be used to boot Linux.


3. Make sure the disk is bootable since my other drive will be my primary disk for now.

How can I repartition and install linux on the second disk?

I apologize for this very common problem... I just can't seem to find an answer to this particular question.