First you need to make sure your Java is updated, be sure to only get Java updates from Java.com
Download the Mod Tool, I have recently eliminated to download and install each version in succession, you only need to download this file
http://download.nba-live.com/index.php?act=view&id=2516
Extract the contents of the rar file into a folder of your choosing. If you need help extracting from a rar file, refer to this topic.
viewtopic.php?f=132&t=77126
Once it is finished extracting, you want to run the .jar file.
Once it loads it will ask you to choose what game files you are editing, I'll assume you will choose NBA 2K11.
This is what the tool looks like.
Click Open to open a file /obvious
Navigate to your NBA 2K11 folder or to where you saved the .iff file you want to edit.
If you need help figuring out what file does what, check out this thread.
viewtopic.php?f=138&t=75632
Depending on whether or not the file is uncompressed, you may need to decompress the file. Say yes if that pops up. The Mod Tool automatically backs up an uncompressed file.
In the left panel choose which texture (or model) you wish to edit by clicking on the different numbers. Once you find the texture you wish to edit click [Export Res].
You will also want to note the information on the bottom left corner of the Mod Tool that describes the dds texture you have selected. In the image above the dds texture of the Boston Away Jersey Top has a DXT5 compression with a width of 1024 and a height of 512.
Unlike the 2k9 Iff Editor, the dds file you import back into the Mod Tool must be the EXACT same size and compression as the file you exported. This is covered in this thread.
viewtopic.php?f=138&t=80854
When you are finished editing your dds file, or if you have a dds file already created, click the [Import Res] button to import the texture back into the iff file. The Mod Tool automatically changes the iff file so there is no undo or save command.
Quit the program and enjoy.
I also wanted to mention that some files contain "Subfiles" or textures. You access these textures and 3d models click the drop down menu next to subfile.
