For those of you who continue to ask about emulators on version 1.51 or higher, you CANNOT use them on those versions... BUT, if you go to PSPupdates.com and download the PSP 2.0 upgrade, and install it (DO NOT UPGRADE FROM SONY'S WEBSITE BECAUSE THE ONLY VERSION THEY HAVE NOW IS VER2.5 AND THERE IS NO KNOWN DOWNGRADE OR HOMEBREW FOR THIS VERSION), there is a site where you can download and install a downgrader that will downgrade from ver2.0 to ver1.5 with a good step by step tutorial (
www.hackaday.com) just do a search on that site for the psp downgrader tutorial. Keep in mind there was a trojan virus relased with some of the download sites for the downgrader that will brick your psp but I used the second link on that tutorial for the downgrader and the only link they have for the 1.5 EBOOT upgrade (because the downgrader makes your psp think it is ver1.0 but it isn't) and I successfully downgraded my PSP from 2.0 to 1.5! I never even got the chance to mess around with emulators till now and I'm having a blast. I only wanted ver2.0 for the browser but there are now hacks for using a browser on ver1.5...they aren't the prettiest or fastest, but they exist...