In the next development release there will be support for exporting animations to the FS2004 MDL format as well. Don't expect this feature to be completely stable yet though. On most of my test objects it works, but some still go wrong. So please let me know if you find any issues. To get MakeMDL export the animations correctly, I had to disable the LODs while exporting to the FS2004 MDL format. I don't think this is a big issue, since I was not sure they were working before anyway. I have put it on my todo list to check how to get them working properly.