How to shrink a windows partition to make more room for Linux?

[joe at actionline.com]

How can I shrink the ntfs file system /dev/sda5 shown in the following
screen capture:

- - - http://upquick.com/linux/gparted1.png - - -

to make room to increase the size of my Linux home partition /dev/sda8 ?

I've used ntfsresize to reduce the size of the sda5 partition from 158 gig
to 67 gig, but gparted will not allow me to shrink (resize) sda5.  The
"Resize/Move" option in gparted is grayed out as shown in the screen
capture.

So what else can I do to shrink sda5?