Here is an article that teaches you how to install Snow Leopard in VMWare using a Windows host.
http://www.ihackintosh.com/2009/12/install-snow-leopard-in-vmware-7-windows-edition/
http://www.online-tech-tips.com/mac-os-x/install-snow-leopard-on-pc/
Note: the darwin_snow.iso must always be mounted in the VM’s CD/DVD drive in order for the OS to boot. Shutting down the VM by pressing shut down in the OS will cause a kernel panic. The around it is to open the .vmx file associated with the virtual machine and change smc.present from true to false.