Ok I have used 5.50 GEN for a while now and it has been frustrating. Almost all of the games freeze here and there and some are even worse. I have heard so much good stuff from 6.39 PRO B8 but I never wanted to attempt to upgrade because I heard it needs a 32/64GB memory stick. If that is true then ignore my request for help in upgrading my PSP 1000 to 6.39 PRO B8. Ok so far to start off so I can get the proper help I will tell you what I have. PSP 1000 model and is on latest 5.50 GEN which is Prome -4 I believe. I have a few memory sticks full of games and I am worried the saves might get corrupted so is it possible to upgrade using a 1GB memory stick? Also please clear this up for me.... how much memory does the firmware use? I swear I have seen and heard it was 32GB or something. I do not have a 64GB memory stick. Thanks for the help if anybody wishes to provide it. Also I want to make it permanent. Unless it is easy to get it back. Let us stick with permanent though I am the lazy type to redo the hack.