Thanks for the reply that helped me alot but if i was to put up the intructions i was gonna use like this:
1) Unplug or switch off your console and then switch back on or plug back in.
2) While still OFF connect your Jailbreak/Downgrade device and press POWER then quickly Eject, you PS3 console should turn itself off automatically
3) OPTIONAL - Turn your PS3 on to verify you are in Service Mode (you will see a big red box, you can't miss it) then turn your PS3 back OFF
4) Place the lv2diag.self (FILE 1) from the archive and the PS3UPDAT.PUP (3.41 FW) from the archive on the root of a usb device and plug into the rightmost port on your console (dev_usb0)
5) Power on your PS3 with the usb device in and have a coffee, it can take a few moments for the PUP to install, your PS3 will turn off automatically
NOTE: if your system seems unresponsive and the light just stays green for ten minutes or more you need to use a different usb stick. i've had sporadic results with several different sticks.
6) Power your ps3 back on, you should still be in service mode, check your FW version now to verify you have downgraded successfully. Turn Off
7) Remove previous archive files from usb stick and now place lv2diag.self (FILE 2) on the root of your usb stick

Place usb stick in rightmost port of your PS3 (dev_usb0)
9) Turn PS3 back on with usb in place, it should turn itself off very shortly after.
10) Turn your PS3 back on and go through the configuration again.
At number 6) can you turn your ps3 back on and insert a usb with the package files on and then continue with the rest of the intructions.??