Hello.

I'm new to FlyerTalk and have had some questions answered in the US Airways Forum, but I think this is the most appropriate forum for these next questions. This is a bit of a cross-post, but I couldn't delete my earlier post in the US Airways Forum.

Premise:
I'm looking to get two 1st or business class R/T tickets to South America or Europe (1 for me, 1 for my wife).

Hypothetical 1:
If I can get 125K miles in my account for US AIRWAYS, and let's say I get 125K miles in my wife's account for AIR CANADA....

Is the redemption process as follows: I find any *A airline itinerary that we both want on ANY *A airline (maybe using the ANA tools or AwardNexus or calling the airline). Let's say I found it with CO. I would call US AIRWAYS and they would book my trip with CO; and then call AIR CANADA to book my wife's trip and they would book it with CO?

Hypothetical 2:
Suppose Hypo 1 works out. What is the best way to ensure that my wife and I actually get the same planes and itineraries because we're booking using two different FF programs to book on *A?

Hypothetical 3:
Can I "mix and match" airline miles across programs for a *A ticket? For instance, what if I amass 62.5K miles on US AIRWAYS and 62.5K miles on AIR CANADA, both in my name? Can I get a flight on CO through the *A for 125K miles? And how would I accomplish this?

Hypothetical 4:
If I end up with 250K miles in one airline's program, say US AIRWAYS, can I get a 125K ticket for me and a 125K ticket for my wife on US AIRWAYS or a *A airline? Or do I have to use my miles for my solo travel?

Thanks again in advance!