Backup the floor, logos, and stadiums to be replaced.
Paste these .iff files into the NBA2K14 directory, e.g., C:\Program Files (x86)\Steam\SteamApps\common\NBA2K14
Play the game with a fantasy Hornets floor, stadium, and logos.

Note, if you have added other logos to your game (Llarge, medium, small, tiny), this overwrite them.