and regarding the other question...
...what do you mean by "select"?
If you mean "watch" then you don't have to do anything - the correct provider is "selected" automatically when you switch to one of the provider's channels.
If you mean "edit the keys of" then you need to get hold of an editor which is designed to recognise and manipulate the particular layout of the key file you are using. Each wafer file can have its own unique layout. Often the corresponding editor comes packaged with the wafer files.
Or did you mean something else?