The Tiger installer (which comes with the bonus edition or pre-ordered copy) does not work under Vista....There is only one way around this and that is to "borrow" a save game from someone...just so happens I have one.
Before you use the save make sure you patch your game because it was made with both patches installed and using it without them could crash the game.
Mirror 1: http://www.megaupload.com/?d=FWN0PGQ7
Mirror 2: http://www.4shared.com/file/9L95D1it/bw2patch1_1.html
Patch 1.1 to 1.2:
Mirror 1: http://www.megaupload.com/?d=Y95VPG0C
Mirror 2: http://www.4shared.com/file/Jxi82Bz5/bw2patch12.html
To install the save:
1. If you haven't done so already, run the game and create a profile, then exit the game.
2. Download the Tiger save:
Mirror 1: http://www.megaupload.com/?d=UF7HPN5D
Mirror 2: http://www.4shared.com/file/wgs0Hzhu/Tiger.html
3. In the Tiger zip is a folder called "2"...you can change the number if you have other saves...but don't name it "1" because the game uses that for autosaving...Anyway put the 2 folder in your saves folder (usually documents/Black & White 2/Profiles/~Player/Saved Games..."~Player" being your profile name).
To use it:
Run the game...load your profile and then load the save...It should be called Tiger...or something along those lines.