Limit expense types based on trip schema

Hi!

I know a few people have asked about this subject already, but I haven't fount a thread that solves my problem.

I want to limit expense types based on trip schemas. This means that for schema 01 the expense types shown would be different than schema 02.

I have looked at the badi TRIP_WEB_CUSTOMIZING, but it kicks in before the schema is chosen. Is there a badi that will stop after the schema is chosen?

We are on NW04.

I hope someone can help!

Thanks!

Ellen