This small gadget can be used to extract files from the mixfile archives, and it also makes it possible to repack mixfiles.
v0.1.7 - Some support for XBox 360 mixfiles (Endian)
v0.1.8 - Compression of non DDS files
v0.1.9 - Handle invalid filenames (MXGP)
v0.2.0 - Handle very large mixfiles (2GB+) found in Sebastien Loeb rally.