There's a channel from the psu to the front of the pc, the hdd is in that channel as well. My thoughts: The cold channel is not new but if I put the hdd in there its going to get cooled, and the air to the psu wont be much more hot.
![Image](http://mega.ist.utl.pt/~jpsa/stuff/psu_and_hdd.jpg)
works nicely, temps of the hdd droped 5ºC and the psu isn't noticeably hotter
![Smile :)](./images/smilies/icon_smile.gif)