Sure no problem
Dim newName As New FileInfo("filename.gif")
newName.MoveTo("filename2.gif")
This should work. You can look at fileinfo.moveto() or file.move() for more information
here is an example http://www.example-code.com/vbdotnet/rename-file.asp
you can google "vb.net rename file" and get more.
Does that help?