First of all, thank you very much for that manual.
I searched in a bunch of forums and it took me at last 4 days to find that forum entry.

I've done it exactly the way you described. and up to now it all worked fine. I am now, at this moment, updating my software on my phone, and it seems to work great. i will edit this post when it's done and working ;)

but first I have one question.
Does it still cause problems using A2uploader when having a master reset as it says in the faq4mobiles.de forum?
Und bitte nach der Anwendung des a2uploader keinen master-reset machen, dies kцnnte zu Problemen fьhren.
I got my phone brand new and I really don't want to demolish it now :-P

i used the following code for the customize_upgrade.xml:
<customization>
−
<info>
<cda-number>1201-0116</cda-number>
</info>
</customization>
i've bought my phone @ o2-online_shop with a o2-branding preinstalled, which is really annoying.
Oh ... at least i've forgotten to tell ya where i come from and which blablub i use(d):
i am from germany and i used some central-europe firmware.

EDIT! :

IT WORKED!!! GREAT JOB!!!
THANK YOU VERY MUCH!
i did not let myself confuse by the pop-up in SEUS while updatin':
...reinstall your old software...(it was something like that)...

:)
lovely!