So my xbox finally seems to have died a horrible death...now i want to upgrade slightly and buy an xbox slim, unfortunately i don't think my 360's hard drive is compatible with the new xbox slim. So, my question is how do i transfer everything that's on my hard drive at the moment (gamer profile, save games etc), onto my new xbox slim?

You can do it with an Xbox 360 Transfer Cable. (http://support.xbox.com/en-US/xbox-360/accessories/set-up-transfer-cable)

http://www.amazon.com/Xbox-360-Data-Transfer-Cable/dp/B003S9WJ9A/ref=sr_1_1?ie=UTF8&qid=1390260430&sr=8-1&keywords=Xbox+360+Transfer+Cable