Does anyone have any information on this patch? my retail copy came with it installed. :S

I only know about patch 1.1. My guess is that version 2.0 is the censored edition where they supposedly removed some content related to the Sikhs after some major rage aimed at the game.

Don't ask me what was removed, though. Personally I've only beaten the original UK release with patch 1.1 and pretty much all articles and posts about the censorship are contradictory with some stating that only cosmetic changes were done to one level, others saying that up to three levels were completely removed.

Funnily enough version numbers were also weird in case of the original game. There's also releases of Hitman: Codename 47 that have version numbers which are higher than the latest official patch (ending with a "c" instead of a "b") but seem to be identical otherwise.