If it is below 5.03 FW you can use a temporary hack which allows homebrew and ISO. If it is 6.20 and below you can use the Patapon Demo exploit to run homebrew but not ISO/CSO games. Temporary firmware tutorial: http://www.psp-hacks.com/forums/f133/the-ultimate-guide-for-psp-3000-and-psp-t246199/ Patapon exploit: http://www.psp-hacks.com/forums/f133/using-emulators-on-official-firmware-t260263/
@ dracky w nooob! lol coarse its been fixed thats why its the 5.03 hack not the 5.55 hack etc... because it only works up to 5.03 thought id set you right
the 3000 can be CFW enabled you just need sum basic Electronics know-how. you can actually build your own mod-chip to put 5.00 m33-6 on a PSP-3000 the only reason u usually cant is a few .PRX(from a decrypted 6.20 OFW) and the Rom Flash chips which you can get PSP-2002 Ram flash chips and resolder,if you know how its much easier that way
The only reason is that you can't flash a 3000 with CFW without extra hardware like you say. That method costs money, and a lot of people don't have much in these times...