I had problems importing Bully nif files in both Nifscope and 3ds Max. The reason was that a lot of Bully nif files are using big endian format. With but now even this files can be imported into nifscope using this xml file:
http://dfiles.eu/files/iqwab2oiy. Nifscope can than save the nif file as stanard litle endian one, that can be also imported in 3ds Max.