It allows you to play PS2 games.
No the Xbox could not run an emulator for the PS2
No, a DS emulator is not compatible with the PS2
Read about the PS2 emulator on the related link
see both the related links for information on the best working PS2 emulator.
PCSX2 is the only PS2 emulator to consider and they are working on Version 9.9
The related link allows the download and is a guide to set up a PSCSX2 PS2 emulator
No the emulator does not work with the PS2, it uses the PS2 Bios
http://emulator-zone.com/doc.php/ps2/pcsx2.html - PCSX2 PS2 Emulator.
ps3 emulator emulates, copies the function of the ps3 games on your computer, if you have the roms of the game. Till now there are no emulators for ps3, but PS2, there are three of'em, PS2emu, NeutrinoSX2 (not recommended for commercial games) & PCSX2 (highly recommended). Quote from Wikipedia on PCSX2 "several games have full functionality" not quite what the PS2 does is it. see related link to see how worthless the emulator is when the alternative is buying a PS2 for less than $100. no wonder there is no PS3 emulator
yes with the PS2 Bios and a PCSX2 emulator
Ps2
PCSX2 is the PS2 emulator program