A few months back we wrote a workshop showing you how to install a bigger hard disk in your Sky+ PVR, enabling you to record far more programmes than possible with the 40GB drives the older versions come with.

It's a pretty easy process, but the one downside we found is that you lose any TV programmes you haven't watched.

A company called Copy+ has now developed a free software app that copies TV programmes from your existing hard disk to your PC, which can then be copied onto the new, bigger hard disk. We haven't had a chance to test the software yet - but will.

Having read through the process on their web site, you'll need to be pretty confident with your PC and need an XP machine using a Pata drive rather than Sata (you can't put a Sata disk in the Sky+ box) to connect the two disks to IDE connectors on your PC. Alternatively, you can use external hard disk cases, such as the Enermax Laureatte, but that involves additional expense.

In theory it sounds like a good idea, but first impressions suggest it's really only for those that absolutely must copy existing programmes to the bigger disk, because it does make the upgrade more complicated.

Once we've tried it, if it works, we'll update our workshop on how to upgrade your Sky+ hard disk.