Yes you are going to need more than a single 9vdc battery to power this. Here is a tutorial on makeing an RC rover with an arm on it.
So will it work if i use a 7.2 V–620mAh battery to power the ssc-32 board and then use another 7.2 V–620mAh battery it will work? That is what i think they used on the link you sent me.
You should be using 6.0vdc batteries for servos.