An image with your IP inside tells whoever downloads it where your
Temple lives.  The CIA downloads everything.  So the image ships with
no address, and at the VNC console you say:

  NetcfgSave("185.241.6.18","255.255.255.0","185.241.6.1","8.8.8.8");

It applies at once, like NetcfgStatic, and writes ~/NetCfg.HC so every
boot after remembers.  Call it again to move the machine.  Open
connections die, servers on INADDR_ANY keep listening on the new
address.  Del("~/NetCfg.HC") goes back to DHCP.

Tested in QEMU: up on DHCP .15, NetcfgSave to .20, reboot, the Temple
came back on .20 by itself and Wget went out through the new gateway.