The current index card formats (on the full 8.5 x 11" sheet) are the only ones officially supported, but there's a very good tool created by a customer that lets you get any recipes into Word for printing. It's called the BOPTool (BigOven Printing Tool) and it's available here: http://www.bigoven.com/Printing-Recipes-and-Cookbooks-recipe-group47
BigOven.com
170,000+ Recipes