.pot file & payment gateway

2 questions:
1. I would like to translate the .po in Dutch, is the .pot available? I'm willing to support the future updates for Dutch.
2. I would like to integrate an extra payment provider (myself) for iDEAL payments by Sisow (Dutch). If finished, is it possible to integrate this feature as a standard 2nd payment gateway in this plugin, without (my) charges?
Greetz, Petra Blankwaard