Do you want Linux on Windoze, or Windoze on Linux?
WINE is a possible option for the former.
CoLinux is a possible option for the latter.
WINE uses the Windoze API's to emulate a Windoze base thus allowing Windoze based software to install under Linux.
Co-Operative Linux is a full Linux Distro running as a Windoze program. I currently have it running GenToo.
I hope that helps.