TS, thanks for your speedy reply,
Yes I agree you Guys here really Help everybody.
Understand about keeping a little freedom and choice, you are of course right.!
Just that this topic DM800seV2 was covered mainly in other languages.
Buddy, Thanks for adding the Links and the Tutorials.
You are as always very Helpful and you would be sadly missed if you ever left us here...Cheers

OK, lets get back to the subject at hand,
So I get the secondstage ALL SIM OS for the DM800seV2 JapharSIM from here:
http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=293#Post293
1.Leave Old SIM in Box Flash secondstage ALLSIM.
2.Turn Box OFF at the back.
3.Exchange the Old SIM for the JapharSIM and then connect Box again for Flashing and Flash new Japhar 800seV2 image via Browser as usual.

Job well done.
Thanks TS if I have made a mistake please feel free to correct my answer.
AJP