I'm the proud owner of a shiny new iPhone and I like to use it to listen to music in the background when I'm browsing the web, reading an ebook or whatever.

As we were developing games for iPhone™ and iPod® touch, we realised that people might want to play their own music as they played our games too. There are slightly different methods for iPod touch and for iPhone, but first of all go into the sound settings of the game you want to play and turn off the game sounds and music. In GTS World Racing, for instance, you need to select the 'Disable Audio' setting within 'Options'.

Once you've done that, exit the game and go to 'Music' on your iPod touch or 'iPod' on your iPhone. Choose what you want to play and start the music or podcast. Exit using the Home button and return to the game, and hey presto, your own soundtrack! There are a couple of other ways to do this - for instance you can double press the Home button on an iPod touch to bring up the music controls within the game, but this doesn't work for the iPhone. If you're using the iPhone headset provided with it, you can press the headphone button to start the music, but the best thing is to turn off the in-game music and sounds first.

As GTS World Racing involves cars you'll want to design your own driving soundtrack - I'd recommend 'Song 2' by Blur or 'My Favorite Game' by The Cardigans - but if you have your own favorite driving tracks, why not share them in the Comments?