Can't run dvd's

Hello, i have a compaq m700 with windows 2000, i got a dvd drive but i don't have any kind of soft ware that will let me read any dvd's on it! i found the decoder pack on this website and downloaded it bu when i try to instal it my computer says "this program is designed for windows xp" "fatal error has ecoured" (sory for my spelling)

my compaq DOSEN'T have internet, i'm running every thing from a very old Mac, and transporting it on a memory stick (2 gig)