Hello I want to know if there is a method to order the vertices in a 3d.obj model ... I want the vertices to be in order 1, 2, 3 or 6, 5, 4 but the model that I want to import into the game has the vertices disordered for example 1, 3, 2

Please help how to convert a file in .unk format to .obj and then .obj to .unk again ... those files are from dragon ball z bt3 ps2