BAT MEGA FAQ
This thread contains solutions to common problems, as well as a list of helpful resources.
If, after reading the FAQ, you're still having problems, post your question in either the Gmax Troubleshooting thread, or the 3ds Max troubleshooting thread, depending on which program you use.
For corrections or additions to the BAT Mega FAQ, send me a PM.
The old BAT Mega FAQ can be found