M2000 MiFi vs ethernet router

I'd change the DHCP configuration on the router (change the router address to something like 192.168.5.1 and change the pool to 192.168.5.2 to 100, for example). Then when your Ethernet PC connects to the router through DHCP, it'll have a 192.168.5.x address. Then when you connect to wireless via your PC, the wireless adapter will get a 192.168.0.X address and you should be able to get to the mifi via the 192.168.0.1 or 0.2 address (because wifi address does not conflict with address handed out by the router).