OK.., I got the software to partition, shrink etc.. already. I'm inquiring here becasue my feeble brain is unsure of what option to choose in setting my promo edition of Windows 8 on my Windows 7 drive. I figure i want to allow like 100GB's for it and I have like 225GB's left on the drive free space.

I sure do not want to mees this drive up or my other drive bootup ,which has XP on that one. Thanks.