Ask the Experts / Using dummy stations to produce a merged ride with block brakes

Has anyone done this before? I admit I've never used the dummy track method before but I'm familiar with the basic process. In theory the original track (holding the cars) would be in continuous circuit mode, so is there a way to make it follow the block sections of another track? Or could you do enough block brakes to hold the right amount of trains, then do the dummy track, and then have an equivalent number of block brakes on the "real" layout?

I really want to learn how to do this too but every tutorial I find gives me a headache. lol