I don't understand your question?
In general I tried to make HID to VPAD as easy to use as possible (also when using the network client). You can attach/detach/reattach your USB devices at any time and it just should work as expected.
There is only one case (afaik) were things could go "wrong":
- When you have like 4 Controllers of the same type connected to the console (same vid/pid).
- Map them in a random order to pro controllers.
- Detach them
- Switch the Application
- And attach them again.
In this case, the order of the controller MIGHT be screwed up.
For example, me and my friends play smash bros, we are 6 people and we are missing 1 controller but we have a DS4. When you connect this to hid to v-pad you have to choose wether it will emulate pro controller 1, or pro controller 2, and so on. When we choose pro controller 1 for instance, when we are in the game and turn on the first wii remote it turns out to be the same as the DS4, and as a matter of fact, the DS4 doesn't work unless the wii remote assigned to spot 1 is powered on.