The following is a list of firmware compatibility files I've already created for you to use:
The firmware compatibility files are created in almost the same way that payload files are -- through the use of a .bin file of data and the ttbin2oth.exe converter application, which is bundled with GCC4TI 0.96 Beta 10.
The format of these files is as follows:
* [jig response size (2 bytes, Little Endian!)] [jig response data]
* [descriptor size (2 bytes, Little Endian!)] [device 4 configuration descriptor 3 data]
The entries with asterisks are required. Others may be added in the future; they are NOT required, but you MUST have an entry there with a size of zero.
An example of a .bin file with this data is here.
Remember, when using ttbin2oth.exe, make sure you specify "FWCB" as the extension!