Ah yes. The Valiant.
Erm. Good luck with this one, whoever plans to attempt a conversion. Firstly the model is 71599 faces (38602 vertices) so might struggle in most games. Secondly the textures are embedded in the model which will mean a new set will require making or rendering from the original model.
However. All is not lost MP. There is a much lower poly version of the exact model you picture and whilst not exactly as well detailed is 5092 polys. If you or anyone wants it just give me a shout.