If you have the image loaded the you can send it to the printer using a PrintDocumentControl....

vb Code:
  1. Dim img As Image
  2.     Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  3.  
  4.  
  5.         img = New Bitmap("c:\IMG_0425.jpg")
  6.         Dim pd As New PrintDocument()
  7.         AddHandler pd.PrintPage, New PrintPageEventHandler(AddressOf Me.pd_Print)
  8.         pd.Print()
  9.  
  10.  
  11.  
  12.     End Sub
  13.  
  14.     Private Sub pd_Print(ByVal sender As Object, ByVal e As PrintPageEventArgs)
  15.  
  16.         e.Graphics.DrawImage(img, 10, 10)
  17.  
  18.     End Sub
I don't have any tiff images, so I tested it with a jpg. Not sure if it matters... I wouldn't think so.
kevin