All they are saying is you will need to unsolder the wires from the old pcb and resolder to the new. So you need to be proficient at soldering, an eye for detail in connecting the correct wires to the correct points and confident at doing the task. Otherwise get someone to do it for you. The pcb isn't just a matter of unplugging the molex connectors. They are just covering they're arses and I think you will be ok. Mind you I haven't done one of these yet.
