The Emulation Theory

The main goal to achieving this is to make the PS2 ISO in such a way that the PSP thinks it is a PS1 game. Many people just convert their PS2 ISOs to EBOOTs and put it on their PSPs. But the PSP shuts down. The reason is that even when a PS2 ISO is converted to an EBOOT, All the files are respectively placed. The EBOOT is more or less like an archive to the PSP. That is why a converter could be made. When a non supported format disc is inserted into a PS2, the PS2 shows its startup screen and then, it either shows you "DISC READ ERROR" or it goes into the menu. But when a PSP boots an unsupported format disc (when the PSP is on Custom Firmware), it goes off. It is not configured like a PS2 to show DISC READ ERROR. That is why when a PS2 EBOOT is put on the PSP, it doesnt work. It doesnt matter about hardware and processor speeds like you see in most forums. A typical PS1 disc does not hane SYSTEM.CNF,but to be able to load the PS2 disc, you need a SYSTEM.CNF file. The PSP just searches for its bootable files. But the PSP doesnt recognize PS2s bootable files (SYSTEM.CNF and SLxx_xxx.xx files). That is why the PSP goes off on booting a PS2 EBOOT. If you notice, the PSP takes time before it goes off. This is because it is searching for any bootable file. On not finding any, it goes off. So the PS2 and PS1 game files must be studied carefully to understand their similarities and differences. I suggest using Nascar Rumble (PS1) and Rumble Racing because they are very similar, they were even created by the same team (EA Games).