I am indeed going through the registration process for Switzerland, for two cars (the Earl Camino was just titled here, the Pagoda is in the process) but I have to admit the whole process is quite hazy to me, which is also why I am hiring an agent to do most of the work, and haggling with the authorities, for me. Then as these rules tend to change often, I don't expect the 'useful life expectancy' of any instruction will be very long ...
The good news is that, once it's behind you (and it can be gruesome), you tend to forget about it very quickly - wind in your hair, exhaust note, oil smell, it just erases your bad memories!