Yes, certainly. Have a look at
http://www.subsim.com/radioroom/show...=87436&page=28 post 560 and the following page where Danurve has posted some screenies showing what needs to be done.
This should give you the idea OK. It might look complicated but it isn't really - it's all done automatically for you after you've pointed the repackers to your BFI file.
Good luck
If anything is still unclear - let us know!!