I have try this.It's work.
1.Go to "Virtual Network Setting-->Automatic Bridging-->Excluded adapters" ,add eth1 for no bridging.
2.At "Host Virtual Network Mapping" ,then set VMnet2(or other VMnet not set) to eth1.
3.Then you set Win2003 using VMnet0(default bridged) and win2000 to VMnet2(bridged)
4.Use ping to check setting is right
Good Luck