Thanks Prixat
I use french version of CS3 (not extended) (but normally it cause no problem )
I find File / automate (here fichier/automatisation)
I click on each sub menus there and see nothing related to DAZ
I check my Photoshop installation :I have the files  PsDZBridge.8li and PsDZUpdateScene.8BA in a DAZ 3d folder in Plug-Ins folder in AdobePhotoshop CS3 folder  in  in Photoshop CS3 fr folder So i don't know why i don't see it somewhere in the menu