I have put together a campaign for this nightfighter too:
It is 6-mission static minicampaign, set in the winter of 1945, during the last months of the Third Reich. You are pilot flying the Arado Ar-234B Night fighter variant. As we all know, the multi-purpose version of the Arado 234 was never used operationally in the war. But the aircraft was however contemplated as a Night Fighter. And it was actually used in that role as well, by a small experimental nightfighter unit, “Kommando Bisping” in southern Germany, during the last ten weeks of the war. They operated without much success, as the type was less than ideal for this role. See this campaign as a simple "what-if", postulating that the same improvisation that was performed by Kommando Bisping also took place in the Berlin area.
The campaign is essentially a variation of my Me 262B1 campaign "Kommando Welter", but with some modifications.
You can find it here:
http://www.mission4today.com/index.php?name=Downloads3&file=details&id=2027