Glad you found it useful.
Since writing the above, I have found that the CS2 merge to HDR does indeed need separate exposures with a wide enough dynamic range to be able to do the merge satisfactorily. I have then been playing around with Photomatix and found they have a free Basic version which will do the merge no problem from adjusted Raw images without the need to bracket, though obviously this is not ideal, separate exposures are the best.
The resulting HDR image either from CS2 or Photomatix Basic can then be Tonemapped in the full Photomatix CS2 Plugin and gives incredible results. I now have a licenced version of the plugin which is cheaper then the full Pro version. If you Google for Photomatix you will find all the details, it really is worth having a go with the trial version at least.
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