well, i has been reading a lot of documentation, and books, including module codes, and in the drupal.org site, there is a many documentation and tips, by example, there is one which explain how to call a function if(module_exists('name')){ name_funct(); } so, is single! but, i think the big problem in this case, its how i know what is the main function for call, i was looking the code, and the module, and him use de hook_nodeapi() for include the Upload Form in the nodetypes define in the settings for the module, so? i just want to do this because i think, if drupal have a upload module, why may i implement a single upload system form my module? PD: please, i am no very good in my english, sorry. :) -- ---------------------- Aldo Martinez Selleras Administrador del Nodo CITMATEL GND Camaguey Tel: 32-291661 E-mail: aldo@caonao.cu Linux User #364356