One problem with emulation is the fact that it's so processor intensive.
Right now, a 1 Ghz machine (mine) is just enough to run a SNES emulator with some graphical filters...
I'd hate to find out what a PS2 emulator will need to properly run...
FYI, emulators are legal, provided they do not use any proprietary code. The Roms however, are not legal (unless they were freeware to begin with).
Personally, if you like a PS2 so much, just go and buy one. The only reason why I have a Snes and Genesis emulator is because
1) The Snes is no longer being produced
2) The cartriges are getting old
3) Stores are charging $100 for Chrono Trigger (and yes I know about the PS1 version)
Technically, I'm not hurting Nintendo or Sega with these emulators as the sale and production of the SNES or Genesis has long stopped. However, if you get a PS2 emulator and the roms you are hurting Sony.
dman> i ahev my chronotrigger.