I know Dreamora is trying to be helpful, so I'll try to be kind, but much of what he's told you is wrong.
The version of the X format Blitz can load does NOT have bones. If it did they WOULD animate your mesh if you changed them in code. Since they're not there, you CANNOT attach objects to them. You would have to use an exporter which converts bones to geometry and hide the geometry in order to achieve that.
Furthermore, the version of the X format that Blitz loads does NOT support mesh deformation of any kind. It supports the same hierarchical transformation of objects as 3DS.
I'm not 100% certain on what I'm about to say, but I'm pretty certain that there are no versions of the X format which support any kind of mesh deformation, I think even the most recent versions just use bones, but perhaps it is possible and I just haven't come across it.
The version of the X format Blitz can load does NOT have bones. If it did they WOULD animate your mesh if you changed them in code. Since they're not there, you CANNOT attach objects to them. You would have to use an exporter which converts bones to geometry and hide the geometry in order to achieve that.
Furthermore, the version of the X format that Blitz loads does NOT support mesh deformation of any kind. It supports the same hierarchical transformation of objects as 3DS.
I'm not 100% certain on what I'm about to say, but I'm pretty certain that there are no versions of the X format which support any kind of mesh deformation, I think even the most recent versions just use bones, but perhaps it is possible and I just haven't come across it.