Sony Ericsson Themes Creator is a recommendable tool if you are the owner of a mobile device from the phones manufacturer.
The application allows you to customize everything in your Sony Ericsson mobile phone, from standby, to the app launcher, menu and calendar. Thanks to the tabbed interface you can quickly move between the different sections. The right side of the program shows the current theme and the left one is where you can make the changes, from selecting a new image to changing text.
We were a little disappointed to find out that you can only upload GIF files, however the program does allow you to change sounds like the alert for new emails, messages or calendar events.
Once you are happy with your changes, press preview to take a look at all the different screens with the changes. It's then just a case of updating the new theme to your Sony Ericsson phone.
I quite liked how you pick your Sony Ericsson model from a list of thumbnail images, unfortunately it doesn't seem the program allows you to update the device list, so you might not find the most recent models.
If you own a Sony Ericsson mobile phone, you'll enjoy this app, which lets you create your own theme.