Registry change permanently?

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It seems that several users are claiming that some registry changes stay permanent (i.e. waking-up Diamond when SMS came) and some not (i.e. not showing the SIM Card contacts).
Yes, I have used Search, and got different solutions proposed but all directed to a particular problem.
Is there a more general solution that noobs like me are missing about:
keeping the registry changes permanent (I mean resisting to at least a Soft Reset)?
Thanks for advice, reading, guiding.

general solution:
use Resco registry editor. one hassle less.

Please note that if any program (say TF3D ) writes to the registry when loading, there's not much you can do, except a delayed script... and even that might not solved if there's a timer running in the background.

Thanks anyway for replying. So, I will test to kill TF3D to see...

So, last results... for instance regarding the SIM contacts view:
RESCO (excellent tools btw): ok up to the next reset.
Without TF3D: again some register changes are erased by the first soft reset.
So enough with that, probably will be solved with a cooked ROM...?
Best.