Is it ok to use google adsense for CPC adds, and then sign up with a cost per mile group and use them both at the same time?
I am not sure of the exact rules, but I see no wrong in putting both adsense and CPM ads on your website at the same time.
sure, you can do that. There are many people using Google AdSense in combination with other advertising methods like Infolinks, Kontera etc...