dont really get your question..but if u asking how to create a HDR photo..u need to have 3 or more photos with different exposure but same composition(on tripod)...after that u can merge them with 1)photomatix *easy n commonly used..but result usually kinda over cooked*  2) photoshop *harder to use..but gives u more control*

if u dont have any tripod or u only have 1 photo...u can do single exposure HDR...use 1 photo but save it in few different exposure..and repeat the steps i mentioned above..

just to give u a very rough idea on how to do...try google im sure there are thousands n thousands of good tutorial around..
p/s: forgot to mention there is another easier way.......just go to buy cameras like a550...lol

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Added on August 11, 2010, 11:49 pm
sounds kinda like apple vs orange to me...one wins in range n sharpness...another wins in constant aperture.....its very much depend on which one u need it more.....

zstan : i suggest u try using Dynamic Photo HDR application, i never used Photomatix before and abit hard on Photoshop. This one simple , easy and nice output also. here i got post in blog before (link)

from 1 pic JPEG to HDR in no time. if got RAW file better 

sample just edited :

HDR-ized


no PP