Yes, a 32-bit version is also wrapped up in the package.
To run BIAB as 32-bit, the startup file is \bb\bbw.exe
To run BIAB as 64-bit, the startup file is \bb\bbw64.exe
(If you have a 64-bit operating system, it's possible to have shortcuts setup for both BIAB-32 and BIAB-64.)
And I agree... it truly is a fantastic release!!!