Hi Jan,
Zhang has good information for you.
Inside KSDK_1.3 there are other options to investigate too but not well documented (yet).
Please review this post for one alternative:
FRDM-K64F Ethernet
And another alternative:
C:\Freescale\KSDK_1.3.0\tools\tfs_generator
This is a command line tool that will take one parameter as a path to a folder that contains your image files. It will process then into a TFS (trivial filesystem) file that you can then include in your project.
Example:
Open Windows Command Prompt to C:\Freescale\KSDK_1.3.0\tools\tfs_generator
Create a new folder (ex: mkdir test).
Copy several image files into the folder test.
Now while in the C:\Freescale\KSDK_1.3.0\tools\tfs_generator folder, type "mktfs.exe test" .
This will create a file nio_tfs_data.c that has your image files in it to be used in your project.
Regards,
David