The 3 parts is 1.3, if you already have 1.3 you only need to download the 1.3x-1.33 patch (works for all other versions as well (1.31 and 1.32)).
Link to the patch (if you have 1.3 or above):
BF-Games.net | Battlefield Community | BF1942 - BFV - Battlefield 2 - BF2142
Also remember that The MOB Server is already running Battlegroup42 1.33. Our community meets there every wednesday and sunday from about 20:00 GMT+1 for online gaming. Ip: 81.169.151.27:14568
Like always, we are looking for new team members, especially Betatesters, Unwrapper and Skinner. If you like to join, just drop a note at our recruitment forums at
www.battlegroup42.de.