What are you using for a hsf now? I know you mentioned it in other threads, but I can't remember off of the top of my head.
The PEP66T can be modded to run on a socket. Rotating the shroud 90 degrees would put the fan on top, as opposed to the side. I know it's been done before, but I can't remember any one posting results as far as cooling potential of this setup. I believe all that's needed to be done is to drill two holes in the shroud where the shroud mount screws attach it to the heatsink.
There might be something in the "Tips and Techniques" section of the front page regarding this.....I'll have a look.
Mr B