How about Thumbalina? Or Tiny Tina (sorta like Tiny Tim....)

Housebreaking is not a difficult thing, but everyone in the family must participate -- including the 4 year-old. When you first get her home, confine her to a small area such as in an ex-pen and cover the area with papers. Once she seems to establish a "favorite: spot reduce the number of papers available. To move the "potty" outside, take a soiled newspaper with you and place it on the ground where you want her to use the potty. Put it down and encourage her to use it and then praise her a lot when she does. Stay consistent with this and everytime she has to go, take her to the same area either with another paper or leave the old one out there for a while. As an alternate method, you could move a few of her poops to the area you want her to use and she will soon get the idea this is the spot.

No punishment unless you catch her in the act, and even then, just a sharp "No" and take her to her outdoor spot and then praise her. Use the same door to exit everytime and she'll soon go to the door. Also, keep an expecially sharp eye on her when she plays, it seems their bladders shrink then. My rule-of-thumb is: If the nose is to the ground for more than two seconds -- outside we go. Congratulations on your upcoming addition and we'll be interested in how it goes.