HELP.Problem in convert HLSL languege to CG Programing

hi,
i have problem to convert HLSL languege to CG,
please help me.
what shoud i do for this?
i work with CAR PAINT sample.
if you have any tutorial about this problem,please send it to me.
thanks.
at2142@gmail.com

What is the issue, any error messages when loading the shader in CG?