kai tak flight plans and woai

So I have been tweaking my fsx (again) and I found a woai flightplan file for kai tak traffic. I would like to delete the woai flightplans but keep the aircraft so the kai tak flightplans can use those planes and not have duplicate airlines flying around. Sound confusing enough?

I have aifp but find it highly confusing even though there is a 60 page manual (haha)

thanks