Custom batch script for DD-WRT firmware

I need a batch script to be made to work with my router which has dd-wrt firmware. The point of this script is to change the ip address of my cable modem. The script must: 1. connect to the router 2. change the mac address of the router 3. restart the wan device (my cable modem) 4. restart the router Again, the main purpose of this script is to change my ip address. This must be done so that it can be accessed through a batch file.