Sure, first step is to buy a hard drive i dont think the IQ2 can handle higher than 1TB and it should be more than enough,
id reccomend the WD AV drives here
since they're designed to be run 24/7, can pick one up at MSY on the cheap
You'll need to get security torx screws (forgot size) to open up the iq2, you can also take care of the warranty stick with a hairdryer if you want.
i forgot the details on getting the hard drive out, but it pretty much involved in removing almost everything around it first.
next install copy+ and connect both hard drives to your computer, either internally or using a SATA to USB adaptor.
start up copy+ and it should detect both drives, select the source and destination appropriately and hit copy.
if it asks about conversion, you dont need that.
few hours later, it will take hours, pop the new drive in, close the iq2 up and force a firmware update for kicks.
thats it, enjoy.
i'd also reccomend having the phone cord disconnected unless you're making a purchase, just as a precaution.
be sure to keep the old drive, incase you cancel your foxtel or whatever.
i might make a better guide later on with pictures if i have time to open it up again
any questions, just ask.