How to set a default signature in my Macro

Hey guys, i want to set my macro to always send an email with the SAME signature. For example, the default signature is "rito@bra.com", then, if Paul runs the macro and sends the email on his outlook account, the signature will be "rito@bra.com", and not his signature. Here is the code:

 Sub email()

Dim OApp As Object, OMail As Object, signature As String
Set OApp = CreateObject("Outlook.Application")
Set OMail = OApp.CreateItem(0)
With OMail
.Display
End With
signature = OMail.HTMLBody
With OMail
'.To = "someone@somedomain.com"
'.Subject = "Type your email subject here"
'.Attachments.Add
.HTMLBody = "Add body text here" & vbNewLine & signature
'.Send
End With
Set OMail = Nothing
Set OApp = Nothing

End Sub

How can i do this? Is there a way to set the path?

Note: Everyone has all the signatures on their machines (in outlook)