SOLVED
Xperia Mini Pro 2.3.4 (4.0.2.A.0.42) Thanx XDA forum, Raph4 & ajzak
Get the ftf files here
http://forum.xda-developers.com/showthread.php?t=1321948
get the Flashtool From here
http://forum.xda-developers.com/showthread.php?t=920746
Install it and you will see 5 folders
Custom
Drivers
Firmwares
Loaders
X10Flasher_lib
take the firmware to the "Firmwares" folder
click on X10FlashTool (Application)
click on Falsh
Press Ok
it will ask you to connect your phone on Flashmode (turn off your phone, press the back button, then connect the USB) press OK
This is an step by step guide
I WILL NOT BE RESPONSIBLE IF ANYTHING GOES WRONG!!!
--------------------------------------------------------------------------------OPTION 1 - Install *.ftf files1. Install Flashtool
2. Copy the *.ftf files that you `ve downloaded earlier to firmwares folder from Flashtool.
3. Click "Flash" button from flashtool and select the *.ftf file firmware and click "OK"4. Relax and wait a while. When the proccess is completed you will get a popup message (don`t click on that!!!)5.b. Power off your phone and plug the USB into the phone
c. Press back button and keep your finger on button
d. Plug USB cable into your PC whilst holding down the back button on your phone
e. A green LED will appear
f. The process will automatically detect your phone and start flashingg. When "Found at USB/........" appear on flash tool you may release"back button", sit down, relaxand wait.Hope this is helpful to you
6. IF the "Start Flashing" message appear everything`s ok if not...repeat. Sitdown and relax (again 
7. When last message appear unplug/plug USB cable
8. DONNE
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Regards,
Ricardo Rendeiro
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