Andreas,
I'm aware English is not your first language; but neither is mine.. however, keep yourself to the facts.. the main thread discussions is about:
can we Customize of Biller Direct 6.35 without NWDI
- the answer is YES, they can; so all your argument about the philosophy behind SAP or what you like to call manager doesn't really matter, this is not what's being asked.
NWDI is there just to mimic the same bad process ABAP does to manage code: - that is the SOLE REASON for NWDI's existence.
of course, as the OP also mentioned, it will be deployed into an EP - there's absolute nothing different in that approach, when he runs an ant build it recompiles an EAR with all SAP dependencies, so it will work with 100% functionality.
and for his last question, he can deploy into any AS setting up in NWDS a server and using the deployment view.
now, the main issue here is how you deal with stuff: - the way I see, you're just a sheep wandering around doing your sheep's business, but you have no real clue about your surroundings.. there are wolves around, a lot smarter than you, a lot faster than you and they will most often always win on confrontation.
PS: I could correct you in every single point you made in your last email, but you're not here asking for help..