true HDR
you will never get similar results with just one RAW image, no matter which program you use. you will only get the range of that one RAW image, no matter how many copies of the image you stack in layers or merge via HDR creation software, such as photomatix (which is the best, and most affordable, especially for students).
im a photography major, and a lot of time was spent on HDR for commercial purposes since the results are stunning.
the only way to get TRUE HDR effects is to use 3 or more images: one under exposed, one over exposed, and one properly exposed, and any other level in between those.