I think the OP means a method of showing VFR heliroutes, such as the mandatory routes published for the London CTA.
I use a 530/430 combination on every flight and haven't found a way of doing this. This nav kit, although with its advantages, is not really up to displaying the level of detail required. I do put in waypoints (some published, some my own) as they are of some use, especially at night, in marginal weather. And of course, when the pax wants to land in someone's back garden.
So I still use a chart, or a map, like Crab suggests (as he obviously has to do for his antique helicopter).