COD MW2 PC TORRENT HELP!!!!!!!!!!!!!!!?

[JayveeTwentythree]

i just downloaded an 11 gig file of cod mw2 pc on pirate bay (torrent) and when i open it there 2 document. DVD1 and DVD2. the instructions say to...
"unpack release"
"mount image or burn it"
"install"
I DONT KNOW WHAT TO DO! help!