Thanks for all the replies.
I just called to try and figure this out, and here is what they told me.
The reservation is the weekend before Thanksgiving, so it's choice season for
DVC, but regular season for cash rooms. I was able to get the entire reservation for her through MS, but she cannot get any discount. If a discount she can use does come up (she gets an AP or a code or whatever) she'll have to rebook those 2 nights through CRO to get the discount. In that case they can link the reservations, but they will not guarantee that she won't have to move.
Because it's choice season for us, renting points is a really good deal for her. She was quoted about $130/night at ASM with taxes (rack rate).
I reserved OKW for Thurs on points (8), Friday and Sat on cash ($289+tax x's 2), Sun-Tues on points (24). So if I rent them for $10/point she'll pay me $320, and Disney about $640 for a total of $960. ASM would have been about $780. OR, if I rent her points for Friday and Saturday too, it'll be $420 which saves her another $220 for a total of $740 - less than the ASM.
So, how good a friend am I? Do I rent the Friday and Saturday points too? Do I wait and hope she can get some sort of code (I'd have to borrow some points to get her Friday and Saturday, and don't really want to use them if she could get a comparable deal with a code - but I don't want to make her move either!)? What to do, what to do...
And does this whole point thing make you feel so much better about owning DVC?

I know it does for me.