[Typo3-dev] $TCA['config'] and MM tables

[Daniel Pötzinger]

Hello List

I want a field like "related News" in tt_news. It means the user should 
be able to select other news items, which are related to the actual.

But I want that the relation is stored in the other direction too.
Means:
-I edit item1 and select item2 as "related item"
-When I edit item2 I want to have allready item1 as "related item"

Is there a way to make it with the standart $TCA['config'] 
configurations, or did I have to use $TCA['config'] / TYPE: "user"
Or did anyone have another idea?

Thanks