1. Unrar ,9Gigabyte free space required
2. install everything in "nba 2k9 \ installers \"
3. click "nba 2k9 \ nba2k9.exe" Enjoy~
if it doesn't work, download the new patch: http://www.rayfile.com/files/a36e7830-9ec7-11dd-9693-0019d11a795f/
PS: It's better to add "http://tracker.thepiratebay.se/announce" and "udp://tracker.thepiratebay.se/announce" to the tracker list of your BT software manually.
Video: http://www.tudou.com/programs/view/Buoy6KhL5So/
Update: Patch for Vista64: ftp://61.130.11.53/patch2/3DMGAME-NBA2K9-NODVD-V1.1.rar