confusingly named Media Sounds section lets you change your Windows system sounds to alternatives in WAV format. Click 'Documents' and you can even save important files that you'd like to be installed by default as a part of Windows. Just click 'Add' to choose them. And again, click 'Apply' when you're done to save your customisations. Burn a DVD Once you're happy with your customisations and tweaks, it's time to burn the finished results to a DVD. Click 'Log | Commit' to update the image first, then choose the ISO-Bootable section for the functions you need. First choose what you'd like to do in the Select a Mode list. You can create an ISO image, burn an existing image, create a bootable USB flash drive and so on. We'll select Direct Burn to create a custom Windows 7 DVD. Find a writable DVD, place it in the appropriate drive, then choose that drive in the Device box if it's not already selected. Enter a volume name and burn speed for the disc, then click 'Direct Burn' to finish. That's it, you're finished: you've made a custom version of Windows 7. We'd recommend you try it out in a virtual machine first, but otherwise your faster, optimised Windows 7 will be ready and waiting for the next time you need to reinstall. Sign up for TechRadar's free Weird Week in Tech newsletter Get the oddest tech stories of the week, plus the most popular news and reviews delivered straight to your