i also have the startup problem with the trainer.
win7 64bit. have tryied everything.
the trainer askes me to use ffshow.. ?
FFShow can be found inside the Combined Community Codec Pack which is a free download (Google "CCCP" ). It will also give you the additional benefit of being able to play several additional media files with Windows Media Player (or whatever Media Player you use).
If this does not help, please consult the Trainer Troubleshooting Guide.