my brother has the exact same model HP. There's no room to add ANYTHING in those stupid machines. instead they give you a useless empty "media bay." I dont think I've ever even see the HP media drives for sale anywhere lol.

but mounting it somewhere is probably a slightly better plan than laying it on teh bottom of the case. it's going to be cramped in there as it is, but at least that gives it a tiny bit more airflow. if you're worried, keep an eye on your temps for a couple of days after you install the drive. You should be fine though.

although this is coming from a girl with not only a drive on the bottom of her case, but one mounted to the side and the power supply having a grand old time sitting on TOP of my case (yes, on the outside)...not that I'd recommend ANY of that, but I'm just trying to prove that chances are you won't blow anything up