Theres some info about it here
http://www.diagnosemefirst.com/PCOS.htm
It is treatable but there isnt a direct treatment, you have to treat the symptoms you have. IE for acne you would have an acne medication, does that make sense?
The usual medication for those with PCOS who have weight problems is metformin, an insulin medication. It helps you loose weight and by loosing weigh can help ease up the symptoms of pcos.
If you are TTC with pcos then you can also get clomid to make you ovulate.
Sometimes you can have a combination of both medications to work together.