Are you suing the P8000 model.
The Pantech Crossover (P8000) has been dropped by AT&T. Since it's stuck on Android 2.2, and the community behind it is limited, there's no way to get to Android 2.3 (which is required for the latest version of Flash). So, you'll never be able to upgrade Flash without buying a new phone that already has Android 2.3 or 4.0 on it.
The Pantech is also too slow for most Flash sites - so even if you could run them, it would be slow.
Moving this discussion to the Installing Flash Player forum.
(sorry for the mis-spell)