By playpen, this is what I'm referring to:
[ame="http://www.amazon.com/Precision-Pet-Soft-Side-Large/dp/B001GS71KW/ref=sr_1_1?ie=UTF8&s=home-garden&qid=1246281308&sr=8-1"]Amazon.com: Precision Pet Soft Side Play Pen, Navy/Tan: Home & Garden@@AMEPARAM@@http://ecx.images-amazon.com/images/I/41DgV7COm2L.@@AMEPARAM@@41DgV7COm2L[/ame]
They also have the wire pens, though:
[ame="http://www.amazon.com/Midwest-130-00-Cat-Playpen/dp/B000I1M76Q/ref=sr_1_1?ie=UTF8&s=home-garden&qid=1246281382&sr=1-1"]Amazon.com: Midwest Homes for Pets 35.75 inches long by 23.5 inches wide by 51?@@AMEPARAM@@http://ecx.images-amazon.com/images/I/61Xnf9kCf1L.@@AMEPARAM@@61Xnf9kCf1L[/ame]
If you aren't home with her all day, this might be your best bet for litter box training. Good luck!