I was a bit gutted when I upgraded the firmware on my PSP to 2.71 in order to get the Flash Player on there. I had a lot of useful homebrew like a PDF reader and some open source games like Tetris, and its always good to have the choice to try out some demos/games of your own (for example with LUAScript). Anyway some good news and probably the smoothest hack yet. You can now navigate to a special tif image on your memory stick and the preview icon alone will cause the PSP to run in User/Kernal mode all ready for homebrew.
Disclaimer: When I mention “homebrew” I am not refering to pirate material, games or movies, only non-commercial content created by the PSP homebrew community.