You can tab through all the clothes using the VCR controls, next to the Solo Mode button in Bryce. All the imported objects are Meshes, so by clicking one of the VCR buttons you can tab through all the meshes in the scene, one by one, in the order which they were added. The outer buttons will make you jump to the next object type (terrain, sphere, cone, mesh, etc), and the inner buttons will tab between objects of the same type. You can also select each mesh individually by using the little triangle on the selection palette and choosing the "selet mesh" submenu.