Is your dog neutered? When you say that he is "peeing everywhere", I immediately thought that perhaps he's marking his territory. Don't leave him unsupervised and always accompany him when he goes outside to do his business. As Sansal stated, be sure to give your dog lots of praise and a treat when he relieves himself in a more appropriate place. If your dog is not crate trained, it would be helpful to confine him to a small (and preferably non-carpeted area) of your house when you can't supervise him.
Stacey: a.k.a. mom to Chief, Sarge, & Buddy (05/28/01 - 08/31/09)
A dog is not "almost human" and I know of no greater insult to the canine race than to describe it as such. -- John Holmes