sloped walls

Hi,

I am using Triforma V8 XM to produce architectural 3D models. I have been using the 'Place Linear Form' to create my walls. However I do have some areas in the floor plan that have ramps. How do I create sloped walls? I also need to create walls to enclose a staircase so I also need to create these walls to follow the slope of the stairs.

Any thoughts?  There is no one in my office that has a solid working knowledge in Microstation 3D (my office is mostly AutoCad) so any help would be greatly appreciated.

Thanks.