I'll try to explain it more clearly:
My hard drive has a big 300GB partition with Windows 7. I want to shrink this to 40GB and create space for logical partitions to put linux and data. From what I understand windows 7 doesn't like it when the partition boundaries are changed. From the gparted manual:
If the partition is an operating system boot partition, then a move step might cause the operating system to fail to boot.
so you have to uncheck the "Round to cylinders" check box for copy and move/resize in gparted. I tried to that in the gparted 0.7.0 that was in the knoppix 6.4.4 2011-1-30 Live CD. After a lot of looking I couldn't see such a check box. But I saw an "Align to" pull-down menu with three options: MiB, Cylinder, None. Is selecting 'none' the same as unchecking the ""Round to cylinders" check box for copy and move/resize"?
I checked the alignment link in the gparted manual and it says:
Use None only if you have an in-depth knowledge of disk structure, partition tables, and boot records. This setting places partition boundaries relative to the end of any immediately preceding partition on the disk device. This setting is not guaranteed to reserve or respect space required for boot records.
this scared me a bit, I don't think I have "an in-depth knowledge of disk structure, partition tables, and boot records", so I thought I better ask first.