Simplest would be to search the forums (e.g. for the error message printed). If that does not help you should search for 32bit patch or Irrspintz. If that still does not help then no, cannot be removed.
i believe that the 16 bit limit is applied only to independent objects... so that would mean that if i load 2 meshes into irrlicht, each with 65535 polys, they would render correctly, right?
right... the limit comes from the fact that 16 bit integers are used for the vertex indexing/referancing. This was discussed a few weeks ago. All you have to do is replace the 16 bit int with a 32 bit one. (search in the beginners help forum) that gives you about 4 billion ( I think) and that should do you until their bringing out 128 and 256 bit processors running on quantum particles and super conductors
Basically, if you can't load a model with 32 bit you can't play your game without the latest super computer
No, the 128bit is the memory bus width and has nothing to do with numbers here. It's just double amount of data travelling across the memory bus compared to 64bit cards. There would be no use in using 128bit indices. The 16bit index limitation is a pure software problem.