ok wichich lt 3.0 firmware do i use for a fat lite-on drive
Once you get your DVDkey using the right equipment, JF should popup with a dialog asking if you wish you auto load LT+ firmware, it will load the right firmware automatically, just click yes.
Once you have done that, you can click liteon erase, confirm all the popup dialogs and then write the LT firmware, remember to click outro afterward, I like to click outro twice, but its not required.
I also like to click save Key on the FW tab too to have several files with info about my firmware.
Martin is right, this would be the third time you've been told to read the JF tutorial, it can help you much more than you think. I gave you a link to it too...