Shamelessly copied from: http://www.stereoplex.com/blog/vmware-fusion-guests-with-a-static-ip VMWare Fusion v4
get the MAC address of the vm: Virtual Machine - Settings - Network Adapter - Advanced make a note of it, it will be needed later
open /Library/Preferences/VMWare Fusion/vmnet8/dhcpd.conf: make note of the subnet range -> select a fixed ip outside of this range make note of the "options routers" ip address -> needed later append: