Heart instead of diamond?

Does anyone know how to make a heart shape in this lace sock pattern instead of a diamond?
http://www.knitpicks.com/books/books_display.aspx?itemid=50498

I have ordered the pattern but don’t have it yet, so not exactly sure what they did to make the diamond. If you know of a book that shows how to make such lace patterns that would help!

Thanks in advance :heart: :heart: :heart: :heart:

answering my own question…
Don’t know if this will work in this case, but I found a chart for a simple heart pattern at
http://www.woolworks.org/patterns/heartsocks.txt