Want some help to Shrink Volume for dual booting a system

[Dharitree]

I need some help to dual boot my system. But I do not want to modify any other partition. I looking for some option through which I can shrink the existing Windows Directory. I am using XP rightnow and want to add Vista. The size of C drive is around 280GB and I want to take 200GB out of it. The existing tool in Vista does not allow me to go above 160GB.

[SMichael]

The inbuilt partitioning tool comes with some limitation due to which you are getting that error. It is recommended that you use a third party software. Gparted is one of them. A very easy to use software to resize the partition as per your need and easy to manage also. I will not recommend you to use Vista utility. Because if there is any issue with mbr your system might not respond well.