Version 3.5 of the REDitor II has been released with support for NBA 2K12 files from the Xbox 360. For those who are unaware, REDitor II is the roster editor for the PC version of NBA 2K12, containing a host of essential features for modding the game. It also still supports NBA 2K10 (PC), NBA 2K11 (PC and Xbox 360) and MLB 2K11 (PC).
REDitor II is made by Vl@d Zola Jr. Be sure to check out his release thread for the download links, new version change logs and support.