Extend depenedent enumeration kind of feature with other typ

Hi,

I want to choose one item from the dropdown list and based on that list i want a set of strings to be printed in separate lines. The second set of items can be either a description kind or a multi-select checkbox with pre-defined selected fields,(I dont want user to select anything from the second list)

I tried defalutvalueprovider with description attribute type,however, it doesnt work :(
Tried to apply default=true with literal and readonly=true with the enumeration type also.
still no luck...

Can someone help to get this feature in an RTC workitem?

Thank you