I'd think they should provide a wiring diagram or something that should tell you if you can do this. I know IceCap does provide a wiring diagram. I guess what I'm saying is that IF you can do it, there will need to be some wiring reconfiguring done and you'd need a wiring diagram to do it.
I searched for a Blueline VHO ballast on the 'net and came up with nothing. I thought they only made MH E-ballasts.