is your question rather software compatibility? do you mean VGA software? downloading Nvidia drivers or Ati drivers can help the pc recognise shader options, but, alas, your VGA card must be 4.1 compatible! (as mentioned by our moderators)
if not, truly sorry, and upgrading to a VGA card that can optimize shader 4.1 will have to be done!!
just my thought
i hav ati radeon 2100 which shader model does it supports????