Intersection Modeling - Multicenter Curves

I have been using inroads for a year and now just found out about using the multi-center curve command. I am modeling an urban t-intersection with sidewalks and c&g. In the intersection I am dropping a different template in that does not include the side walk and c&g. How is the best way to combine the minor and major road surfaces (ie where in the rad return do we allow one template to take over the other? This may be a function of intersection drainage. Any tips on modeling intersections using this method(multi-center curve command) would be gretly appreciated. I am going back and forth trying different things. I am using Inroads V8 XM.

Thanks

Jason