@ Chrono
I have tried this on my slim PS3 using MGS3 and it doesn't work. I can actually play the backup disc of MGS3 fine, but when I try and boot into the camoflauge download section it has a black screen and a few seconds later it shows the splash screen saying it isn't a Playstation format disc. I copied the compressed boot elf from 4.12 as it says in the guide and renamed it, changing the size values and everything perfectly I am certain.
You have a fat PS2 right? Maybe the MGS3 exploit only works on that? Or maybe only on the NTSC version of it? I have a PAL version, but it is from the release date March 2005, so it shouldn't be patched or anything.
Thanks for posting the guide.
Ok just now I have managed to get the hack working with Fifa 2004 (PAL) on my friends original FAT PS2 SCPH-3003 (PAL). Used 4.30 Ulaunch uncompressed version. Made my own swap card and opened up the disc tray in order to swap discs at the main menu. Went into the online bit and then selected network configuration and bam black screen and I was worried, but then yes finally thank fuck the launchELF screen.
Now for the geek monologue. Man I was going crazy last night. I borrowed my friend's FAT PS2 and managed to find a blank DVD+R too, hoping the hack would work. I tried to run my genuine MGS3 in the fat PS3 and it would give a damn disc error, it wouldn't boot MGS3 at all. Must be a weak laser. So then I decided to try fifa 2004 which would boot. I copied my version and burnt it, but the burning failed. Was it because I did it at 4x or do I blame crappy Panasonic? So no spare blank DVDs! I decided to leave it until the next morning, hoping the Sony blank DVDs I ordered last week after I read about this hack, would arrive.
So I woke up today and opened the disc tray cover and made my own swap tool out of an advertising credit card. The plastic isn't as strong as a real credit card, but it still works. So I tried MGS3 again but it wouldn't boot. Arghhh, I even cleaned the disc with toothpaste and still nothing. Popped it into my slim and it was fine tho <_> Tried the failed burning disc of Fifa 2004 but that didn't work obviously.
Thankfully the sony disc pack arrived later in the day and I decided to try Fifa 2004 again. I burnt it this time at 1x to make sure nothing would go wrong. I tried it in my slim and I ran into the same problem as MGS3. So then the fat! First time I tried the swap I failed, maybe I did the sliding incorrectly? Second time though was perfect as I mentioned above.
My conclusion is that the slim has extra security checks not allowing the variety of games to work with this method, as they do with the fat. I think maybe agent under fire is the only game that works on the slim for this exploit. However with fat it seems the compatability list is far greater.
This is why the compatability lists and reports of which games are working are a bit skewed without knowing which PS2 the owner tried it on. From the few people who made it clear whether they had a slim or a fat, I noticed only agent under fire was working for slim people. However I read of fat users thst successfully did the hack with MGS3, smackdown 2006, madden 2004 and others.
Now I will install MCBoot and then chuck the memory card in my slim and I will be a happy bunny ^_^