If you don't want to use the auto-updater, you can
download the patch from:
http://www.4shared.com/dir/943184/706ded87/sharing.html
Get all three parts, use winrar to unpack the archive
inside the main game folder, then run "Patch v2.0.bat".
After completion, you can also run the Modpack.exe
(I guess it is a modification pack).