I don't know - I bought the eagle expansion pack last night and I had no problems getting it installed and running and Poser is on my E: drive under E:MediaPoser. I had to create the bum files myself - but I would imagine the file size would have been unusually large if they had included bum files. For what I paid for this wonderful package - I'm not complaining. I think bloodsong did an outstanding job as always. Here's a quick render of the male merlin I did last night - a half hour after I purchased it. ;) Jade