The Xperia Play (aka. PlayStation Phone) is one hell of a gaming device, but the fun goes to a whole new level when you root the device to smithereens and gain super user access!
Thanks to the folks over at XDA, you can unlock the Xperia Play’s bootloader and furthermore root the device to gain super user access to do things with the Play which Sony Ericsson doesn’t want you to do, for example take screenshots and gain Market access in regions where paid apps aren’t available. Just a quick excerpt of the guide is as follows:
. Unlock Bootloader Stick to lollylost100′s Tutorial
2. Download my package: R800i WORLD .184
Open a Terminal (on windows Start->Run->cmd)
Now copy the downloaded package to the location of fastboot you used for unlocking. Enter this command:
Windows: fastboot flash system YOURDOWNLOADEDFILE.img
Linux: fastboot -i 0x0fce flash system YOURDOWNLOADEDFILE.img
Mac: fastboot-mac -i 0x0fce flash system YOURDOWNLOADEDFILE.img
Now wait until its done.
3. REBOOT & ENJOY
You can follow the guide posted at this link for a step by step instruction on how to unlock the bootloader and also gain super user access.