Categories on 2 Calendars

I run 2 separate calendars on my desktop. I would like to run a certain set of categories for one Cal that are totally different from the other Cal. Can someone please tell me how to do this? Whatever I set for Categories in 1 Cal are also showing in the other. I am using the Shadow4 skin.

The categories are global so they will be always same in both calendars. The only way to have different categories is to make two separate installations of the app and run them in parallel. You need to use the portable installation (see Rainlendar) so that they don’t share the same settings.