VMware Server changes subnet of Host-Only network after reinstall

A client of mine in California ran into an issue with VMware Server.

A VMWare server instance runs on a Window 7 x64 with a couple of WindowsServer 2008's running inside. These guest machines run on a host only network.

The underlying Windows 7 OS had to be re-installed and after re-installing VMWare Server (and the console plug-in) the machines would initialize but the console came up black.

After determining that this was not related to the Host-Only network, a reboot of the Windows 7 box made the console work again.

Then we discovered that the previous Host-Only subnet had been changed after the re-install (291.168.112.128 --> 192.168.29.128).

After changing the static IP address in the guest machine, all was right with the world again (until the next hiccup).