DUDE!! This is A How-To Root Your Xperia X10!!

Rooting your Xperia X10 2.3.3 GB will give you a freedom to play with it such as;
1. Using Root app
2. Install Variety of Roms
3. Modification such as;
-changing your boot screen
-changing your themes,phones icon,battery icon and more!!

Check out XDA Developers Forum to find more!

Okay, let's do this! ROOT!


Requirements :
1. Usb cable
2. The latest FlashTool click here >>>>X10FlashTool GB Xrecov Ready<<<<<
3. Azuzu kernel >>>DOWNGRADE<<< and >>>UPGRADE<<<
4. Your Computer :)

Instructions : [I've tried this and it works]

1. Enable Unknown Sources & USB debugging [Menu -> Settings -> Applications -> Unknown Sources & Menu -> Settings -> Applications -> Development -> USB Debugging]
2. OPEN FLASHTOOL program on your Computer!!
3. Power down device
4. Flash >>-- Kernel downgrade --<<...after its done/finish flashing, just leave the flashtool running.
5. Power on device
6. Immediately connect usb cable
7. Wait till you see any info in FlashTool, then click root.
8. After the program finish rooting your phone, it will automatically reboot your phone. Turn off by pull out your battery immediately and wait for a sec and then put it back but dont turn it on.
9. Push BCAK button and connect usb cable to your computer.
10. In the Flashtool, select FLASH and flash  >>>-- Kernel upgrade--<<. and follow the instructions.
11. When it's done, Power on your device and HOLA! your phone is rooted!

Credit goes to aZuZu from xda-developers