robocopy resets folder timestamp

[Jaz]

Is there a way of copying/moving a dirctory tree and preserve the
timestamps. This is for 50+ GByte filesystems, say when moving to
larger harddrives, etc.

I'm used to being able do this under UNIX, for example:
tar cf - . | (cd newdir; tar xBfp -)

But UNIX tools under windows don't handle junctions, truncate paths,
etc.

robocopy.exe (using latest from Win2003 reskit) fails in that it
subfolders have new modification dates (timestamps).

Please help.
Thanks
Jaz