Customize product view per categories

[Guest enslaved]

Hi there,

I got a problem to customize the product THUMB per categories.

I know how to customize product display per category changing the viewProd.inc.php as this :

if($prodArray[0]['cat_id']!=57 && $prodArray[0]['cat_id']!=58 && $prodArray[0]['cat_id']!=59 ){$view_prod = new XTemplate ("skins/".$config['skinDir']."/styleTemplates/content/viewProd.tpl");}

else  {$view_prod = new XTemplate ("skins/".$config['skinDir']."/styleTemplates/content/viewProd2.tpl");}

but i've tried to make the same change for the viewCat.inc.php as this: 

if($prodArray[0]['cat_id']!=57 && $prodArray[0]['cat_id']!=58 && $prodArray[0]['cat_id']!=59 ){$view_cat = new XTemplate ("skins/".$config['skinDir']."/styleTemplates/content/viewCat.tpl");}

else {$view_cat = new XTemplate ("skins/".$config['skinDir']."/styleTemplates/content/viewCat2.tpl");}

but it doesn't work, i think because the $prodArray is not the good command but i can't find what to do.

Please help!!