Dont get me wrong about this post, i like MPH's firmware launcher and am not dissing it. All i am saying is be careful. I recently booted 1.5 dump on my 1.5, just to see if you could actually boot UMDs and games from inside it, and if you check for updates. I went to network settings, since i hadnt set up a connection since downgrading. I clicked on it, and my psp froze for 30 seconds and then crashed. After 30 seconds it shut off. I figured MPH doesnt write to the flash so everything should be ok. I turned it back on, and now my screen turns on to the black, when it first turns on and then freezes. I cant figure out what happened, but now i have a nice brick. I am not blaming MPH, because like I said he has a great program. what happened may have been some weird glitch or bug or something. all i am saying to you guys, is dont change settings while running mph, because it runs at a higher risk. i am going to have to try and go to the store today to get a new psp..