Multigroup output in Views: how to create a row for each (multigrouped) data

Hi,

first of all: thanks a lot for this awesome module. I think it fills a big gap in CCK for very many situations.

Now: In my user profile (content profile of a node type for parents of a kindergarden) I use multigroup to add info about the children. So I have set up a multigroup that contains a picture, the first name and a birthday of the kids. On editing and viewing the node, everything is OK.

However, I want to be able to use this multigroup in Views.
I figured that I can/must use the "Group multiple values" options in the field settings for each of the three fields in order to not get any duplicates. But doing so, I get one row (i.e. a <li> item) for every node instead regardless of how many multigroup items (children) I entered.

What I really want, is a row item for every item of the multigroup. I am sure, that this can be done by overwriting some theming function, but wouldn't it be cool to have this as option similar to (or as a replacement for) the "Group multiple values"?
From browsing the code, the "Group multiple values" stuff is done in the content_handler_field_multiple. Is it possible to create such a handler for my purpose?
I'd be willing to give it a try, but I'd need some hints on how to start this.