Ps2 emulator?

I dont know where to start and which ones the best? i dont want to flash my bios or anything! I just really want to play gran turismo 4. i have a ps2 controller and the usb adapter. and can i upscale it like if i had component cables?thanks
Answer #1
http://www.emulator-zone.com/doc.php/ps2/
says google
Answer #2
PCSX2 get it from this site. you can also get a BIOS from this site too for the software to work, the official forums wont help you if you mention it though.
Answer #3
http://pcsx2.net/