Pack multiple animation tracks in one FBX file

I need multiple animations takes to be placed in one FBX file, but 3ds max isn't able to place them in separate timelines. So is it a way to place several animation takes in one FBX file? Added: what I tried is exporting in "txt fbx", then adding in notepad a new take in the "take section", then reexport in binary fbx. But it looks like a little bit comples