I am sure someone has asked this before, but my searches are never successful...

I am a *gold with ANA and am planning a trip on UA domestic. Although I will only get 70% miles on a discount ticket, I would like to use the perks of priority check-in/E+ on my trip so I am planning to book it w/ my NH membership. I am a general member with UA, but have some miles in my account to burn. Do they allow for booking with NH, but upgrading with UA miles?? I would also like to accrue these miles onto my NH account for next year's status... I am presuming this is not allowed, but any thoughts? thx.