Ha. Look at this:)
I did everything carefully, run the installer ok it was loading then after that it restarted my psp. Went to check the verison of my psp and it says 5.02 GEN-A (full) Thank you ALOT BRO. I really wanted to go down after all these stuff. It didn't upgrade to gen-b it just went to 5.02 GEn-A (full) and first it was 5.50 thank you alot