Honestly, you can't push the issue. She'll do it when she's ready. And though I think that potty training 10 month olds is, um, not truly potty training, I do agree with pp's statement that your daughter could backslide when the baby is born anyway.
A lot of people asked if I was going to start potty training my son before the new baby came (he was 2, and was 27 months when she was born). I knew that there was no way I would try that, only to have him revert! He has had some surprising reactions to the new baby...some just recently (she's 7 months old). I wouldn't push the issue.
Something to consider about "2 in diapers"...have you ever thought about cloth diapers? They are really so much easier now, and if you get the "one size" diapers, both your children can use them! My 38 lb 2 1/2 yr old son and my 7 month daughter can wear the same diaper in 2 different brands of one size diapers, with just the adjustment of snaps! Please email me if you would like more info (I am not selling, I just love using cloth, and I wish more people knew how easy it really is!). The savings are astronimical when you think about it (though I did use disposables for DD when she was a newborn) and you can use the same diapers for both of them. What's more is there is a great resale value on cloth, so when you're finished with diapers you can sell them and get back some of your cost. You can even buy them used (which may sound weird, but back in the day of diaper services, those diapers were washed and reused all the time. there are a lot of ways to disinfect). Disposables can't say all of that!
I think you will have a harder job trying to get a not-ready (or even a kind of ready) toddler to potty train while taking care of a newborn. Having 2 in diapers isn't that much harder, except on the pocketbook. I'd be happy to give you names of diapers, where you can buy new, where you can buy used, and even what I think of a lot of diapers. GL!