Funny thing, they (DealXtreme, GBATemp, and other modding sites) sell stealth chips, solder-free ones that just clip in and go. Nowadays there are highly advanced softmod guides that replace the system software with a custom one and can access an upgraded HDD. Come to think of it, there are GameCube modchips that have USB sockets in them that allow you to load homebrew from external drives and the FreeMCBoot (Which is what I'm looking into) can allow you to run homebrew from the PS2 HDD and such, the modding community has all kinds of neat stuff, which is why I got a PS2 itfp, I hear there's even a DVR homebrew program! as time goes on, more and more mods become prevalent and more people look into exploiting them. I'm stoked on how much cool stuff there is, and that's without emulators!