How to I change the “Create User” button to an ImageButton?

[vincent90152900]

I like to Customize the layout of a CreateUserWizard component and I would like to chnge the “Create User” button to an ImageButton.
How to do that?
Following is my codes.

[HTML] <asp:CreateUserWizard ID="CreateUserWizard1" runat="server" OnCreatedUser="CreateUserWizard1_CreatedUser" Height="120px" Width="241px">
<WizardSteps>
<asp:CreateUserWizardStep runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="UserName:"></asp:Label>
<asp:TextBox ID="UserName" runat="server"></asp:TextBox>
<br />
<asp:Label ID="Label2" runat="server" Text="Email:"></asp:Label>
<asp:TextBox ID="Email" runat="server"></asp:TextBox>
<br />
<asp:Label ID="Label5" runat="server" Text="Password:"></asp:Label>
<asp:TextBox ID="Password" runat="server"></asp:TextBox>
</ContentTemplate>
</asp:CreateUserWizardStep>
<asp:CompleteWizardStep runat="server">
</asp:CompleteWizardStep>
</WizardSteps>
</asp:CreateUserWizard>[/HTML]