I have found several guides on the Internet that show the ways in which this can be done. I have spent a lot of time trying to get this done. My PSP is completely soft modded with CFW 5.50 prome-4 and homebrew and related things run perfectly. My only issue is in using a PC keyboard to control the PSP through a USB. I need like a step-by-step tutorial explaining how to do this. I've been trying to do this for a very long time, over the course of a few years. I'm not worried about updating my custom firmware if there are guides for later versions, and people have been able to get this working. Can anyone help me please?