How can I achieve mulitple rows within a header? I'd like to be able to have a header title, that groups other headers, then have my row data..

Can one do this?

|----------------------------------------------------------|

|                 Header Group                     |

|----------------------------------------------------------|

Header 1a   |  Header 1b   | Header 1c   |

|__________|___________|___________|

|row value 1 |   row value 2 |  row value 3 |

|row value 1 |   row value 2 |  row value 3 |

|row value 1 |   row value 2 |  row value 3 |

row value 1 |   row value 2 |  row value 3 |