Yes,there is 0 chance you will be able to run a 64bit OS on 32bit host...VMware cannot emulate a 64bit cpu when it isnt there..Infact,CPU is the only one which is not emulated...The guest os actually accesses cpu directly..Imagine a virtual motherboard with a hole in the place where cpu sits...In that hole,vmware sees the actual cpu/processor and not a virtual cpu.