More options for Advance Order Search's Keyword part

You can easily incorporate some more options for the Keyword part of the Advance Order Search. Following is a list of the options available on the Keyword part of the Advance Order Search.

BillToFirstName
BillToLastName
BillToCompany
BillToAddress1
BillToAddress2
BillToCity
BillToProvince
ShipToFirstName
ShipToLastName
ShipToCompany
ShipToAddress1
ShipToAddress2
ShipToCity
ShipToProvince
OrderNotes

For example Edit the Website/Admin/Orders/Default.aspx file and locate the following code

<asp:DropDownList ID="KeywordSearchField" runat="server">
                                    <asp:ListItem Value="BillToLastName" Text="Bill To Last Name"></asp:ListItem>
                                    <asp:ListItem Value="BillToCompany" Text="Bill To Company"></asp:ListItem>
                                    <asp:ListItem Value="BillToAddress1" Text="Bill To Address"></asp:ListItem>
                                    <asp:ListItem Value="ShipToLastName" Text="Ship To Last Name"></asp:ListItem>
                                    <asp:ListItem Value="ShipToCompany" Text="Ship To Company"></asp:ListItem>
                                    <asp:ListItem Value="ShipToAddress1" Text="Ship To Address"></asp:ListItem>
                                    <asp:ListItem Value="OrderNotes" Text="Order Notes"></asp:ListItem>
                                </asp:DropDownList>