Reply to Numark Mixtrack and headphone problems.

Hi im struggling with an illness atm and going thru Chemo i had a real problem with my benefits but managed to get some backdated, so i bought a Numark Mixtrack and a camera that records in HD.
I cantwork atm so im looking for something positive that will take my mind off things, i want to do some mixes as i used to DJ at free raves in 91-95 and make some videos and put them on youtube.

The problem im having is with the headphones as a monitor, the way i have set up my HDTV,PC and Surround sound is i have my sound from the PC going into the sony HDTV thru the HDMI cable from the radeon 5850 graphics card, ive then plugged the logitech 5.1 surround sound set into the HDTV's headphone socke, that way i can use the TV remote to control the sound from the PC.

I have a normal set of headphones with 3.5mm jack and also a nice USB PC Headset that i wanted to use as a monotor, is there any way i can do this it would make a frustrated DJ very happy.

Thanks.