If there are any commands that you want to have run automatically when smartcoin starts, create a file "init.sh" in the smartcoin directory. Then you can add your commands that you want run on startup.
Admittedly undereducated about exactly what AMDOverdriveCtrl is doing to my overclock settings/performance - but I have to start it for both cards everytime I reboot my rig. How can I script this with a detached screen? I'm trying in an init.sh file w/ SmartCoin:
#!/bin/bash
screen -dmS ctl0 "AMDOverdriveCtrl -i 0"
screen -dmS ctl1 "AMDOverdriveCtrl -i 3"