I'm trying to figure out the selection of transformations using the classname macro, but I have a few questions.

I've created two new document types, ImageBanner and FlashBanner.
Both with different default transitions.
Both can be placed as children of a Page (MenuItem).
On the page template I have a repeater that i want to render using the child items of the page (with the content filter of ImageBanner and FlashBanner). I'm trying to do this setting the transformation to "{%classname%}.default" but for some reason the macro picks the class name of the parent document and the repeater uses the MenuItem.default transformation on all of the items. Is there a macro for finding out the class name of the child item instead of the parent object?

If I use <%# Eval("classname") %> in the transformation the text rendered are "ImageBanner" or "FlashBanner".

The only solution seems to be to make a generic document type that has a transformation with logic that renders differently given the evaluated value of "classname". In my opinion it would be a really ugly solution (from a OOD point of view) to just paste the different transformations of the two different document types straight into the generic transformation. Is it possible to somehow (using a usercontrol or something like that) dynamically grab the items document transformation from within the generic transformation?

Am I on the right track, or is there an easier way of achieving what I want?