Replacing the dialer I have recently replaced the stock samsung system on my note 2 with paranoidandroid, but I don't like the dialer.  I have tried a few alternatives and found some I like, but none of them replace the bit that actually makes the calls.  When I use, e.g. dialer one, I get a great interface that I like, but the moment I press the call or answer button it goes back to the original interface.  Is there any way to completely replace it?
I don't think we can do this just by installing an app.

I mean, we can't define our new app as default app for making/receiving calls.

So, I think it's in ROM developer's hand. Only they can replace it with custom one, AFAIK.