Insert Picture & Auto Size To Active Cell Dimmensions

What I am trying to do is to give the user the ability to insert a photo and have it autosize into a range of cells--so far I can only get it to work with a single cell and a predefined file. Can this be refined so that rng references a group of cells and pic somehow lets the user input a file name or pick its name and location?

Sub test()
On Error Resume Next
Set pic = ActiveSheet.Pictures.Insert("C:
ange.gif")
On Error Goto 0
If Not pic Is Nothing Then 'Found it!'
Set rng = ActiveCell
With pic
.Height = rng.Height
.Width = rng.Width
.Left = rng.Left
.Top = rng.Top
End With
End If
End Sub