defining arrays in config files

Hello, I would like to ask something I ever asked on php.smary.general, but without getting any accurate answer, I think it should better be asked here : 1) Is it possible to define arrays in config files ? How to do it ? 2) How to concatenate a string with a variable like $smarty.const.CONST in a config file ? I ask all this questions because I would not like to use the header of my tpl to define what should be done in the config file... Thank you -- http://perso.efrei.fr/~ansari/