Hi, try this, it worked for me
Use gparted in linux(dont install the Os just use the live cd) to create the required partitions. 1 ntfs, 2 fat32.
install windows first on Ntfs then make 1 partition active.
install OSx second on the active partition.
reload the windows mbr using the windows install disk, in windows download EasyBCD and create a boot file for Osx. check that you can boot in and out of Osx and windows.
Install Kubuntu on final partition.
Linux grub will show various boot options one being windows if you click that it then will give you the option to boot either windows or Osx.

Raz